H3CNE-RS GB0-192-ENU Exam Actual Questions

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GB0-192-ENU
Exam Name: H3CNE-RS+
Full version: 485 Q&As
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1. The following two static routes are configured on the router:
IP route-static 192.168.0.0 255.255.240.0 10.10.202.1 preference 100
IP route-static 192.168.0.0 255.255.240.0 10.10.202.1
So regarding these two routes, which of the following statements are correct?
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A. The routing table will generate two routes to 192.168.0.0, and the two routes will serve as
backups for each other.
B. The routing table will generate two routes to 192.168.0.0, and the two routes will load-share
C. The router will only generate the second configured route, with a priority of 0
D. The router will only generate the second configured route, with a priority of 60
Answer: D
2. Which of the following description of the star network topology is incorrect? (Multiple choice)
A. Star topology is easy to maintain
B. In a star topology, the failure of a certain line does not affect computer communication under
other lines.
C. The star topology is highly robust and has no single point of failure.
D. Since the star topology network shares the bus bandwidth, performance will decrease when
the network is overloaded.
Answer: CD
3. As shown in the figure, if PC 1 and PC 2 want to achieve mutual access, what configurations
should be done on the RTA?
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A. [RTA-GigabitEthernet0/0] ip add 10.0.20.254 24
[RTA-GigabitEthernet0/0] int GigabitEthernet 0/0.1
[RTA-GigabitEthernet0/0.1] vlan-type dot1q vid 10
[RTA-GigabitEthernet0/0.1] lip add 10.0.20.254 24
B. [RTA-GigabitEthernet0/0] ip add 10.0.20.254 24
[RTA-GigabitEthernet0/0]int GigabitEthernet 0/0.1
[RTA-GigabitEthernet0/0.1] vlan-type dot1q vid 20
[RTA-GigabitEthernet0/0.1] ip add 10.0.10.254 24
C. [RTA-GigabitEthernet0/0] ip add 10.0.10.254 24
[RTA-GigabitEthernet0/0]int GigabitEthernet 0/0.1
[RTA-GigabitEthernet0/0.1] vlan-type dot1q vid 10
[RTA-GigabitEthernet0/0.1] ip add 10.0.20.254 24
D. [RTA-GigabitEthernet0/0] ip add 10.0.10.254 24
[RTA-GigabitEthernet0/0]int GigabitEthernet 0/0.1
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[RTA-GigabitEthernet0/0.1] vlan-type dot1q vid 20
[RTA-GigabitEthernet0/0.1] lip add 10.0.20.254 24
Answer: D
4. The command to change the link encapsulation from PPP to HDLC on the MSR router is
______.
A. line hdlc
B. link-protocol hdlc
C. encapsulation hdlc
D. line-protocol hdlc
Answer: B
5. IPv6 site-local addresses belong to the ______ address type.
A. Unicast
B. Multicast
C. Broadcast
D. Anycast
Answer: A
6. On the MSR router, you see the following display in the routing table:
Destination/Mask Proto Pre Cost NextHop Interface
7. Use the display nat session command to view the NAT information, which is displayed as
follows:
There are currently 4 NAT sessions
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From this information, we can know that the private network address is ______. (Multiple
choice)
A. 192.80.28.12
B.10.0.0.1
C. 192.80.29.4
D.10.0.0.2
E. 192.80.28.11
Answer: BD
8. In the IEEE802.11 standard, which devices that can support both the 2.4G frequency band
and the 5G frequency band? (Multiple choice)
A. 802.11ax
B. 802.11a
C. 802.11b
D. 802.11g
E. 802.11n
F. 802.11ac
Answer: AE
9. During the LCP negotiation stage, what content will the PPP negotiate? (Multiple choice)
A. Link layer encapsulation protocol type
B. Verification method
C. Maximum transmission unit
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D. Network layer protocol type
Answer: AC
10. The Ethernet port Ethernet0/0 of router MSR-1 is configured as follows:
Interface Ethernet0/0
IP address 192.168.0.1 255.255.255.0
A layer 3 switch is connected to this interface, and this layer 3 switch is the default gateway for
multiple network segments of the customer's office network. For security reasons, the customer
now requires configuration on the interface Ethernet0/0 of MSR-1. ACL (does not restrict
application direction) to prohibit all users on the office network from pinging 192.168.0.1. Which
of the following configurations can be used? (Multiple choice)
A. acl number 3000
Rule 0 deny icmp destination 192.168.0.1 0 icmp-type echo-reply
B. acl number 3000
Rule 0 deny icmp destination 192.168.0.1 0 icmp-type echo
C. acl number 3000
Rule 0 deny icmp destination 192.168.0.1 0
D. acl number 3000
Rule 0 deny ip destination 192.168.0.1 0 eq icmp
Answer: BC
11. The network environment is as shown in the figure, ______ is the correct NAPT
configuration. (Multiple choice)
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A. acl number 2000
Rule 0 permit source 192.168.0.2 0.0.0.255
Nat address-group 1 1.1.1.1
Interface Ethernet 0/1
Nat outbound 2000 address-group 1
B. acl number 2000
Rule 0 permit source 192.168.0.2 0.0.0.255
Nat address-group 1 1.1.1.1
Interface Ethernet 0/1
Nat outbound 2000 address-group 1 no-pat
C. acl number 2000
Rule 0 permit source 192.168.0.2 0.0.0.255
Interface Ethernet 0/1
Nat outbound 2000 address-group 1 no-pat
D. acl number 2000
Rule 0 permit source 192.168.0.2 0.0.0.255
Interface Ethernet 0/1
Nat outbound 2000
Answer: AD
12. Which of the following statement about the OSI reference model is correct?
A. The data at the transport layer is called a frame (Frame)
B. The data at the network layer is called a segment (Segment)
C. The data at the data link layer is called a packet (Packet)
D. The data in the physical layer is called bit (Bit)
Answer: D
13. One of the customer's MSR routers is connected to the Internet through the WAN interface
S1/0 and connected to the office network through the LAN interface GE0/0. Currently, office
network users can access the Internet normally.
Add the following ACL configuration on the router:
Firewall enable
Firewall default deny
#
Acl number 3003
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Rule 0 deny icmp
Rule 5 permit tcp destination-port eq 20
#
Interface GigabitEthernet0/0
Firewall packet-filter 3000 inbound
Firewall packet-filter 3000 outbound
So______.
A. ICMP messages to the Internet initiated by office network users are prohibited from passing
by the router.
B. FTP traffic initiated by office network users and reaching the router can pass normally.
C. Telnet packets initiated by office network users and reaching the router GE0/0 can pass
normally.
D. FTP traffic sent from office network users to the Internet is allowed to pass through the
router, but all other packets are prohibited from passing through the router.
Answer: A
14. On the MSR router , the -t parameter of the ping command specifies the timeout time of the
ICMPEchoReply message . The value range is 1 ~ 65535, and the unit is milliseconds . Its
default value is ______ milliseconds.
A. 200
B. 100
C. 2000
D. 1000
Answer: C
15. Two MSR routers are directly connected back-to-back through Serial1/0. The following
configuration is seen on one MSR router:
Interface Serial1/0
IP address 8.8.8.2 255.255.255.0
#
Interface GigabitEthernet0/0
Port link-mode route
IP address 100.1.1.2 255.255.255.0
#
Rip 1
Version 2
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Network 0.0.0.0 (advertise all interfaces of the router)
#
IP route-static 0.0.0.0 0.0.0.0 8.8.8.1
Assuming that both routers are correctly configured with RIP and all interfaces are Up, which of
the following analyzes about this configuration are correct? (Multiple choice)
A. A RIP default route will be sent from the outgoing interface Serial1/0 to the opposite
neighbor.
B. The peer neighbor router can only receive one RIP route
C. The peer neighbor router cannot learn the default route generated by RIP from this router.
D. RIP routing update messages can only be sent or received from the Serial1/0 interface of the
router.
Answer: BC
16. During the establishment process of the TCP connection as shown in the figure, the X part
in SYNshould be filled with ________.
A. a
B. b
C. a+1
D. b+1
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Answer: C
17. If a port of an Ethernet switch running STP does not receive or forward data, receives but
does not send BPDUs, and does not perform address learning, then the port should be in the
______ state.
A. Blocking
B. Listening
C. Learning
D. Forwarding
E. Waiting
F. Disable
Answer: A
18. The customer’s network connection is in the form: N1-----MSR-1-----MSR-2----MSR-3-----N2
has configured the following static route on MSR-1 :ip route-static 192.168.100.0 255.255.0.0
null0
Then the correct explanation for this route is ______. (Multiple choice)
A. On this router, all data packets whose destination address belongs to 192.168.100.0/16 will
be discarded
B. In some cases, this route can avoid loops
C. The static route will always exist in the routing table
D. If this static route is matched, the packet will be dropped and no information will be returned
to the source address.
Answer: ABCD
19. On the MSR router, use the ______ command to check the NAT aging time of the router.
A. display nat time
B. display nat expire
C. display nat aging-time
D. display nat time-out
Answer: C
20. Two MSR routers MSR-1 and MSR-2 are interconnected back-to-back through their
respective S1/0 interfaces, and their respective GigabitEthernet0/0 interfaces are connected to
the client hosts HostA and HostB respectively:
HostA----GE0/0--MSR-1--S1/0---------S1/0--MSR-2--GE0/0----HostB
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By configuring the IP address and routing, HostA in the current network can communicate with
HostB. Now add the following ACL configuration on router MSR-1:
Firewall enable
Acl number 3000
Rule 0 deny icmp icmp-type echo
Interface GigabitEthernet0/0
IP address 192.168.0.1 255.255.255.0
Firewall packet-filter 3000 inbound
So which of the following statements are correct? (Multiple choice)
A. HostA will not be able to ping its own gateway address, which is the interface address of
GE0/0 on MSR-1.
B. Unable to ping HostB from HostA
C. HostA can be pinged from HostB
D. HostB can be pinged on MSR-1
Answer: ABCD
21. A company's MSR router plans to access the Internet through ISDN DCC dial-up. The router
has the following configuration:
[H3C] dialer-rule 1 ip deny
[H3C] firewall default permit
The dial-up access control list dialer-rule 1 has been referenced under the dial-up interface.
Which of the following statements about dial-up are wrong? (Multiple choice)
A. No IP packet can trigger dialing
B. Any IP packet can trigger dialing
C. TCP type data packets can trigger dialing
D. UDP type data packets can trigger dialing
Answer: BCD
22. Which of the following protocols are network interface layer protocols? (Multiple choice)
A. HDLC
B. Ethernet
C. PPP
D. SMTP
Answer: ABC
23. Regarding RIPv1 and RIPv2 running on MSR routers, which of the following statements are
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correct? (Multiple choice)
A. The destination network segment of the route learned on the RIPv1 router must be a
naturally classified network segment.
B. The destination network segment of the route learned on the RIPv2 router must be the
subnet address of the variable length mask.
C. Both RIPv1 and RIPv2 can learn routes of naturally classified network segments
D. Both RIPv1 and RIPv2 can learn routes on non-naturally classified network segments, such
as routes with a destination network segment of 10.10.200.0/22
Answer: CD
24. After configuring NAPT, I found that some internal network addresses can always ping the
external network, while others cannot. Which of the following are the possible reasons?
A. The ACL setting is incorrect
B. The NAT address pool has only one address.
C. Insufficient performance of NAT equipment
D. NAT configuration does not take effect
Answer: A
25. The functions of FTP data connection include______. (Multiple choice)
A. The client sends a file to the server
B. The server sends the file to the client
C. The server sends the file list to the client
D. The server sends alarm information to the client
Answer: ABC
26. A certain network connection is as follows:
HostA----GE0/0--MSR-1--S1/0---------S1/0--MSR-2--GE0/0----HostB
The customer requires that only ICMP messages between HostA and HostB be restricted.
Which of the following methods are feasible? (Multiple choice)
A. Configure an ACL on MSR-1 to prohibit ICMP messages from the source host HostA to the
destination host HostB, and apply this ACL in the outbound direction of GE0/0 of MSR-1.
B. Configure an ACL on MSR-1 to prohibit ICMP messages from the source host HostA to the
destination host HostB, and apply this ACL in the outbound direction of S1/0 of MSR-1.
C. Configure an ACL on MSR-1 to prohibit ICMP messages from the source host HostB to the
destination host HostA, and apply this ACL in the outbound direction of S1/0 of MSR-1.
D. Configure an ACL on MSR-1 to prohibit ICMP messages from the source host HostB to the
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destination host HostA, and apply this ACL in the outbound direction of GE0/0 of MSR-1.
Answer: BD
27. The main function of the physical layer of the OSI reference model is ______.
A. Physical address definition
B. Establish an end-to-end connection
C. Transmitting bit streams between terminal devices, defining voltage, interface, cable
standard and transmission distance, etc.
D. Transfer data from one host to another
Answer: C
28. The WAN links of the customer's two routers, MSR-1 and MSR-2, use the PPP protocol,
and MSR-1 is required to serve as the main verifier to verify MSR-2 through PAP. So what
configurations are required on MSR-2?
A. [MSR-2-Serial0/0] ppp pap user user
B. [MSR-2-Serial0/0] ppp pap password simple password
C. [MSR-2] ppp pap local-user user password simple password
D. [MSR-2-Serial0/0] ppp pap local-user user password simple password
Answer: D
29. During system startup, type ______ according to the prompts, and the system will interrupt
booting and enter BootROM mode.
A. <Ctrl+a>
B. <Ctrl+b>
C. <Ctrl+z>
D. <Ctrl+c>
Answer: B
30. SPX belongs to ______ of the OSI reference model.
A. Network layer
B. Transport layer
C. Session layer
D. Presentation layer
Answer: B
31. The well-known port number of the transport layer protocol used by DNS is ______.
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A. 50
B. 55
C. 53
D. 51
Answer: C
32. In PPPoE applications, the Ethernet MAC address of the access end is in PPPoE ()
Answer: discover
33. The IP address of a certain private network device A is 192.168.1.1/24, and its
corresponding public network IP address is 2.2.2.1; the IP address of public network device B is
2.2.2.5.
If you want B to be able to ping A, which of the following configurations can be used on the NAT
device?
A. acl number 2000
Rule 0 permit source 192.168.1.1 0.0.0.255
Nat address-group 1 2.2.2.1
Interface Ethernet 0/1
Nat outbound 2000 address-group 1
B. acl number 2000
Rule 0 permit source 192.168.1.1 0.0.0.255
Nat address-group 1 2.2.2.1
Interface Ethernet 0/1
Nat outbound 2000 address-group 1 no-pat
C. nat server protocol icmp global 2.2.2.1 inside 192.168.1.1
D. nat server protocol icmp global 192.168.1.1 inside 2.2.2.1
Answer: C
34. On the MSR router, once the system time is inaccurate, you can use the ______ command
to adjust the system time.
A. time
B. clock
C. clock datetime
D. set datetime
Answer: C
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35. What is the command to start the spanning tree protocol on the switch?
Answer: stp globe enable
36. The function of link aggregation is______.(Multiple choice)
A. Increase link bandwidth.
B. Data load balancing can be achieved.
C. Increased link reliability between switches.
D. Can avoid switching network loops.
Answer: ABC
37. In the routing table of an MSR router, which of the following sources may there be routes?
(Multiple choice)
A. Routesdirectly connected to network segments
B. Static routing manually configured by the network administrator
C. Routes discovered by dynamic routing protocols
D. Routes discovered by network layer protocols
Answer: ABC
38. In the switching network as shown in the figure, all switches have the STP protocol enabled.
SWA was chosen as the root bridge.
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According to the information in the figure, the ______ port should be set to the Forwarding
state. (Multiple choice)
A. P1 of SWB
B. P2 of SWB
C. P1 of SWC
D. P2 of SWC
E. Insufficient information to judge
Answer: ABC
39. 0.1/32 Direct 0 0 127, 0.0.1 InLoop0
40. NAPT mainly converts ______ information of data packets? (Multiple choice)
A. Data link layer
B. Network layer
C. Transport layer
D. Application layer
Answer: BC
41. The customer’s network looks like this:
HostA----GE0/0--MSR-1--S1/0---------S1/0--MSR-2--GE0/0----HostB
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The WAN interfaces on the two routers are configured as follows:
MSR-1:
Firewall enable
Acl number 3000
Rule 0 deny ip source 192.168.0.0 0.0.0.255
Rule 5 permit ip
Interface Serial1/0
Link-protocol ppp
Firewall packet-filter 3000 outbound
IP address 6.6.6.2 255.255.255.0
MSR-2:
Interface Serial1/0
Link-protocol ppp
IP address 6.6.6.1 255.255.255.0
Assume that the IP address of HostA is 192.168.0.2/24, and the routing and other related
interface configurations are correct, then _______.
A. HostA can ping 6.6.6.2, but cannot ping 6.6.6.1
B. HostA cannot ping 6.6.6.2 and cannot ping 6.6.6.1 at the same time.
C. HostA can ping 6.6.6.2 and 6.6.6.1 at the same time.
D. HostA can be pinged on MSR-2
Answer: A
42. The customer’s network connection looks like:
HostA----GE0/0--MSR-1--S1/0-----WAN----S1/0--MSR-2--GE0/0----HostB
The customer's WAN network only supports synchronization mode, and MSR-2's S1/0 needs to
negotiate an IP address from the peer's MSR-1 instead of manually configuring a static IP
address. Then the S1/0 interfaces of the two routers can run ______.(Multiple choice)
A.PPP
B. HDLC
C. PPP+RIP
D.HDLC+RIP
Answer: AC
43. PC_1 logs in to RTA through telnet, then logs in to RTB via ftp on RTA's remote login
interface, and obtains RTB's configuration file. How many TCP connections does RTA have at
this time?
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A. 4
B. 1
C. 2
D. 3?
Answer: D
44. On the MSR router, you see the following display in the routing table:
Destination/Mask Proto Pro Cost NextHop Interface
45. What are the layers of SDN network architecture? (Multiple choice)
A. Transport layer
B. Control layer
C. Application layer
D. Forwarding layer
Answer: BD
46. The customer’s network connection looks like:
HostA----GE0/0--MSR-1--S1/0---------S1/0--MSR-2--GE0/0----HostB
Router MSR-1 and router MSR-2 are interconnected through dedicated lines. The following
three static routes are configured on MSR-1:
IP route-static 10.1.1.0 255.255.255.0 3.3.3.1
IP route-static 10.1.1.0 255.255.255.0 3.3.3.2
IP route-static 10.1.1.0 255.255.255.0 3.3.3.3
Among them, 10.1.1.0/24 is the LAN segment where HostB is located. Which of the following
descriptions are correct?
A. The IP address of interface GE0/0 of MSR-1 cannot be pinged on HostA.
B. The IP address of interface GE0/0 of MSR-1 can be pinged on HostA.
C. Unable to ping HostA on MSR-1
D. HostA can be pinged on MSR-1
Answer: B
47. The customer’s network connection looks like:
HostA----GE0/0--MSR-1--S1/0-----WAN----S1/0--MSR-2--GE0/0----HostB
The customer's WAN network only supports synchronization mode, so the S1/0 interfaces of the
two routers can run ______. (Multiple choice)
A. PPP+RIP
B. HDLC+OSPF
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C. PPP+OSPF
D. HDLC+RIP
Answer: ABCD
48. Two empty-configured MSR routers are interconnected back-to-back through their
respective GE0/0 interfaces. Their interconnection network segment is 192.168.1.0/30. After the
IP addresses are correctly configured, the GE0/0 interfaces of the two routers can communicate
with each other.
Now add the following OSPF configuration to the two routers:
Ospf 1
Area 0.0.0.1
Network 192.168.1.0 0.0.0.3
Which of the following statements are correct?
A. Without a Router ID configured, a stable OSPF adjacency relationship cannot be established
between the two routers.
B. Without Area 0 configured, a stable OSPF adjacency relationship cannot be established
between the two routers.
C. An OSPF route will appear in RTA's routing table
D. A stable OSPF adjacency relationship can be established between the two routers, but there
are no OSPF routes in the routing tables of RTA and RTB.
Answer: D
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49. Two empty-configured MSR routers MSR-1 and MSR-2 are directly connected through their
respective GE0/0 interfaces. The IP addresses of the GE0/0 interfaces of MSR-1 and MSR-2
are 10.1.1.1/24 and 10.1 respectively. .1.2/24, there is IP reachability between the two GE0/0
interfaces.
Then the following OSPF configurations were added to the two routers:
MSR-1:
[MSR-1-ospf-1] area 0.0.0.255
[MSR-1-ospf-1-area-0.0.0.255] network 10.1.1.0 0.0.0.255
MSR-2:
[MSR-2-ospf-1] area 255
[MSR-2-ospf-1-area-0.0.0.255] network 10.1.1.0 0.255.255.255
Which of the following description of the above configuration is correct? (Multiple choice)
A. The command network 10.1.1.0 0.0.0.255 on MSR-1 means to start OSPF on the GE0/0
interface of the router and join the corresponding area.
B. The command network 10.1.1.0 0.255.255.255 on MSR-2 cannot start OSPF on the GE0/0
interface of the router.
C. The OSPF interfaces of both routers belong to OSPF area 255.
D. The OSPF interfaces of the two routers do not belong to the same OSPF area, and the
OSPFArea of one of the routers is incorrectly configured.
Answer: AC
50. The switch SWA port Gigabi Ethernet1/0/24 has been configured as a Trunk port type.
If you want to allow this port to allow VLAN2 and VLAN3 to pass, which of the following
commands needs to be used?
A. [SWA] port trunk permit vlan 2 3
B. [SWA- Gigabi Ethernet1/0/24] port trunk permit vlan 2 3
C. [SWA] undo port trunk permit vlan 1
D. [SWA- Gigabi Ethernet1/0/24] undo port trunk permit vlan 2
Answer: B
51. Three MSR routers RTA, RTB, and RTC are connected to the same frame relay network
through their respective S1/0 interfaces. This Frame Relay network can provide sufficient PVC
resources. As a network engineer, you need to assign IP addresses to these Frame Relay
interfaces.
Which of the following statements are incorrect?
A. If transit through any router is not allowed, at least two IP subnets are needed to enable three
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routers to communicate with each other through this frame relay network.
B. If transit through any router is not allowed, at least three IP subnets are needed to realize the
communication between three routers through this frame relay network.
C. Under the premise of correctly configuring routing, three routers can communicate through
this frame relay network without configuring sub-interfaces.
D. Under the premise of correctly configuring routing, three routers can communicate through
this Frame Relay network using only one IP subnet.
Answer: B
52. The Ethernet port Ethernet1/0 of the customer router MSR-1 is configured as follows:
Interface Ethernet0/0
IP address 192.168.0.1 255.255.255.0
This interface is connected to a Layer 3 switch, and this Layer 3 switch is the default gateway of
the customer's office network segment 192.168.7.0/24~192.168.83.0/24.
Now the customer requires configuring an ACL on MSR-1 to prohibit all users on the office
network from initiating Telnet to the address 192.168.0.1 of MSR-1. Which of the following
configurations is correct?
A. Acl number 3000
Rule 0 deny 0.0.0.0 255.255.255.255 destination 192.168.0.1 0 destination-port eq telnet
Interface Ethernet0/0
IP address 192.168.0.1 255.255.255.0Firewall packet-filter 3000 inbound
B. Acl number 3000
Rule 0 deny 0.0.0.0 255.255.255.255 destination 192.168.0.1 0 destination-port eq telnet
Interface Ethernet0/0
IP address 192.168.0.1 255.255.255.0
Firewall packet-filter 3000 outbound
C. Acl number 3000
Rule 0 deny 255.255.255.255 0 destination 192.168.0.1 0 destination-port eq telnet
Interface Ethernet0/0
IP address 192.168.0.1 255.255.255.0
Firewall packet-filter 3000 inbound
D. Acl number 3000
Rule 0 deny 255.255.255.255 0 destination 192.168.0.1 0 destination-port eq telnet
Interface Ethernet0/0
IP address 192.168.0.1 255.255.255.0
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Firewall packet-filter 3000 outbound
Answer: A
53. On the MSR router, you want to adjust the Keepalive message time of the HDLC protocol to
20 seconds. Which of the following configuration is correct?
A. In the system view, use the command hdlc hold time 20
B. In the system view, use the command hdlc timer hold 20
C. In the interface view, run the command timer hold 20
D. In the interface view, use the command hold time 20
Answer: C
54. There are two hops from the source device to the destination device. Use the tracert
command to detect the path. When detecting the first hop, the source device sends a UDP
packet with a TTL of 1 to the intermediate hop; when detecting the second hop, the source
device sends a UDP packet with a TTL of 2. The packet reaches the intermediate hop first, and
the TTL decreases. is 1. When the packet reaches the destination, the TTL will be decremented
to 0. At this time, the destination device will send an ICMP______ message to the source to
inform the source device that it has tracked the destination address.
A. Time Exceeded
B. Echo Request
C. Echo Reply
D. Port Unreachable
Answer: D
55. During the teardown process of the TCP connection as shown in the figure, the X part in the
ACK should be filled with ______.
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A. p
B. q
C. p+1
D. q+1
Answer: C
56. As shown in the figure, the router RTA is connected to PCA and PCB.
If you need to enable ARP proxy on RTA so that RTA can forward ARP packets between PCs,
which of the following configurations is correct? (Multiple choice)
A. [RTA] proxy-arp enable
B. [RTA-GigabitEthernet0/0] proxy-arp enable
C. [RTA-GigabitEthernet0/1] proxy-arp enable
D. [RTA] proxy-arp enable port G1/0/1
Answer: BC
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57. Which of the following statement about STP, RSTP and MSTP is correct? (Multiple choice)
A. RSTP is an optimized version of the STP protocol. The delay for a port to enter the
forwarding state is greatly shortened under certain conditions, thereby shortening the time it
takes for the network to eventually reach topology stability.
B. MSTP cannot converge quickly. When the network topology changes, the originally blocked
port needs to wait for a period of time before it can become a forwarding state.
C. MSTP is compatible with RSTP, but not STP.
D. MSTP can make up for the shortcomings of STP and RSTP. It can not only quickly converge,
but also enable the traffic of different VLANs to be forwarded along their own paths.
This provides a better load sharing mechanism for redundant links.
Answer: AD
58. If all-0 and all-1 subnets can be used as valid subnets, and the Class C address
192.168.1.0 is divided into subnets using a 27-bit subnet mask, the number of valid subnets that
can be divided is ______.
A. 2
B. 4
C. 6
D. 8
Answer: D
59. Both VLAN technology and port isolation technology can achieve Layer 2 isolation of data.
A. True
B. False
Answer: A
60. TCP belongs to ______ of the OSI reference model.
A. Network layer
B. Transport layer
C. Session layer
D. Presentation layer
Answer: B
61. If you want to upgrade the router but do not have a network cable, you can use the
configuration cable and use the ______ protocol to upgrade through the Hyper Terminal.
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A.TFTP
B. Xmodem
C. Ymodem
D. Zmodem
Answer: B
62. In the network environment as shown in the figure, two routers are connected back-to-back
through serial ports. The rate of the interconnection link must be set to 2Mbps. Which of the
following statement below is correct?
A. It is necessary to confirm that the interface type and cable meet the V.24 regulations
B. Use the baudrate 2048000 command to configure the synchronization port of RTA.
C. Use the baudrate 2048000 command to configure the RTB synchronization port.
D. Use the virtual-baudrate 2048000 command to configure the synchronization port of RTB.
E. Use the bandrate2048000 command to configure the synchronization port of RTA, and use
the virtual-baudrate2048000 command to configure the synchronization port of RTB.
Answer: B
63. Which of the following statement about the functions of each layer of the OSI reference
model is correct? (Multiple choice)
A. The physical layer involves the original bit stream transmitted on the communication channel
(Channel). It defines the mechanical, electrical functions and procedures required to transmit
data.
B. The network layer determines the best route for transmitting packets. The key issue is to
determine how to route the data packet from the source to the destination.
C. The basic functions of the transport layer are to establish and maintain virtual circuits,
perform error checking and flow control.
D. The session layer is responsible for data format processing, data encryption, etc.
E. The application layer is responsible for providing network services to applications.
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Answer: ABCE
64. Two routers MSR-1 and MSR-2 are interconnected through GigabitEthernet0/0. At the same
time, RIPv2 is running between the two routers. Now the GigabitEthernet0/0 interface of one of
the routers, MSR-1, wants to only send RIP messages. If RIP protocol messages are not
accepted, which of the following implementation methods are feasible? (Multiple choice)
A. Configure silent-interface GigabitEthernet 0/0 on the GigabitEthernet0/0 interface of MSR-1
B. Configure silent-interface GigabitEthernet 0/0 on the GigabitEthernet0/0 interface of MSR-2
C. Configure ACL on MSR-1 and apply it in the inbound direction of its GigabitEthernet0/0
interface
D. Configure ACL on MSR-2 and apply it in the inbound direction of its GigabitEthernet0/0
interface
Answer: BC
65. The MSR router sent 5 packets by default during the last ping. If you want to specify the
number of packets to send, you can use the ______ parameter.
A. -n
B. -d
C. -s
D. -c
Answer: D
66. PPP must go through a series of negotiation processes before establishing a link. The
correct negotiation sequence is ______.
A. LCP>PAP/Chap>NCP
B. PAP/CHAP>LCP>NCP
C. LCP> NCP>PAP/CHAP
D. NCP>LCP>PAP/CHAP
Answer: A
67. 0.0/8 Direct 0 0 127.0.0.1 InLoop0
68. Two MSR routers implement dynamic route learning through OSPF. There are three
interface IP addresses on one of the routers, MSR-1, which are 192.168.8.1/24,
192.168.13.254/24 and 192.168.29.128/24. Then you need to pass A network command starts
OSPF on these three interfaces. Which of the following configurations is feasible? (Multiple
choice)
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A. [MSR-1] ospf
[MSR-1-ospf-1] area 0
[MSR-1-ospf-1-area-0.0.0.0] network 192.168.1.0 0.0.255.255
B. [MSR-1] ospf
[MSR-1-ospf-1] area 0
[MSR-1-ospf-1-area-0.0.0.0] network 192.168.1.0 0.0.32.255
C. [MSR-1] ospf
[MSR-1-ospf-1] area 0
[MSR-1-ospf-1-area-0.0.0.0] network 192.168.1.0 0.0.63.255
Answer: AC
69. The following information is seen on an MSR router running RIP:
<MSR>display rip
Public VPN-instance name:
RIP process: 1
RIP version: 2
Preference: 100
Checkzero: Enabled
Default-cost: 0
Summary: Enabled
Hostroutes: Enabled
Maximum number of balanced paths: 8
Then we can analyze ______ from the displayed information. (Multiple choice)
A. The router is running RIPv2
B. RIP’s automatic aggregation functionis enabled
C. The Cost of the RIP routes sent or received by this router is 0.
D. Support 8 routes for load sharing
Answer: ABD
70. SSH uses the TCP port number ______ by default.
A. 20
B. 21
C. 22
D. 23
Answer: C
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71. When we get a second-hand router, we generally need to restore the device to the factory
default configuration to prevent the existing configuration from affecting subsequent normal use.
You can use the () command to delete the next startup configuration file saved in the device,
and then use the reboot command to restart the device. After the device is restarted, the
device's factory default configuration will be loaded because there is no startup configuration
file.
A. Reset saved-configuration
B. Clear current-configuration
C. Reset current-configuration
D. Clear saved-configuration
Answer: A
72. The WAN link between the two routers MSR-1 and MSR-2 uses the PPP protocol. Both
ends learn each other's routes by configuring RIP. Currently, the route learning is normal. Now
add the following command to the RIP configuration of MSR-1:
[MSR-1-rip-1] silent-interface all then______.
A. This command causes all interfaces of MSR-1 to only receive routing updates without
sending routing updates.
B. This command causes all interfaces of MSR-1 to only send routing updates but not to accept
routing updates.
C. After configuring this command, the RIP routes in the MSR-2 routing table disappear
immediately.
D. After configuring this command, the RIP routes in the MSR-1 routing table disappear
immediately.
Answer: A
73. If all-0 and all-1 subnets can be used as valid subnets, and the Class C address
192.168.1.0 is divided into subnets using a 26-bit subnet mask, the number of valid subnets that
can be divided is ______.
A. 2
B. 4
C. 6
D. 8
Answer: B
74. Xiao L is a senior IP network expert and is determined to develop a new dynamic routing
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protocol. Which of the following should a normal dynamic routing process include? (Multiple
choice)
A. Calculate routing
B. Discover neighbors
C. Exchange routing
D. Maintain and update routes
Answer: ABCD
75. The customer router's interface GigabitEthernet0/0 is connected to the LAN host HostA, and
its IP address is 192.168.0.2/24; the interface Serial6/0 is connected to the remote end and is
currently running normally .
Now add the ACL configuration as follows:
Firewall enable
Firewall default permit
Acl number 3003
Rule 0 permit tcp
Rule 5 permit icmp
Acl number 2003
Rule 0 deny source 192.168.0.0 0.0.0.255
Nterface GigabitEthernet0/0
Firewall packet-filter 3003 inbound
Firewall packet-filter 2003 outbound
IP address 192.168.0.1 255.255.255.0
Nterface Serial6/0
Link-protocol ppp
IP address 6.6.6.2 255.255.255.0
Assuming other relevant configurations are correct, then ______. (Multiple choice)
A. HostA cannot ping the two interface addresses on the router.
B. HostA cannot ping 6.6.6.2, but can ping 192.168.0.1
C. HostA cannot ping 192.168.0.1, but can ping 6.6.6.2
D. HostA can Telnet to the router
Answer: CD
76. The DHCP client sends a _______ message to the DHCP server to update the IP lease?
A. DHCP Request
B. DHCP Release
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C. DHCP Inform
D. DHCP Decline
E. DHCPACK
F. DHCP OFFER
Answer: A
77. Which of the following descriptions about Trunk ports is correct? (Multiple choice)
A. When the Trunk port sends data, when it is detected that the data has the same VLAN D as
the PVID, the data tag will be removed.
B. The PVID value of the trunk port cannot be modified.
C. When the Trunk port receives data and checks that the data does not have a VLAN ID, the
data is added with the corresponding PVID value as the VLAN ID on the port and forwarded
inside the switch.
D. When the trunk port sends data, when it is detected that the data has a VLAN ID that can be
passed, and the D is not a PVID, no operation is performed on the tag in the data and it is sent
directly.
Answer: CD
 
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