H3C GB0-191-ENU 問題集

質問 1：
On the MSR router, you can use the ______ command to clear the NAT session table entries.
A. reset nat table
B. clear nat
C. reset nat session
D. clear nat session
正解：C

質問 2：
The Serial 0/0 and Serial 0/1 interfaces of the router of the Shenzhen branch of XYZ company are connected to two different ISPs through two WAN lines, and through these two ISPs, you can visit the website of the Beijing head office at 202.102.100.2, in Shenzhen. The following static routes are configured on the router of the branch office:
ip route-static 202.102.100.2 24 Serial 0/0 preference 10
ip route-static 202.102.100.2 24 Serial 0/1 preference 100
So which of the descriptions of these two routes is correct? (multiple choice)
A. The Cost value of the two routes is the same
B. The priority of the two routes is different, the router will write the first route with the higher priority into the routing table
C. The priority of the two routes is different, the router will write the second route with the higher priority into the routing table
D. The destination address of the two routes is the same, which can be active and standby, and the first route is the master
正解：A,B,D

質問 3：
The two MSR routers MSR-1 and MSR-2 are interconnected back-to-back through their S1/0 interfaces, and their GigabitEthernet0/0 interfaces are respectively connected to the client hosts HostA and HostB: HostA----GE0/0--MSR-1 --S1/0---------S1/0--MSR-2--GE0/0----HostB
By configuring the IP address and routing, HostA can communicate with HostB in the current network. Now the following ACL configuration is added to the router MSR-1:
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 questions)
A. Can ping HostB on MSR-1
B. I cannot ping my gateway address on HostA, that is, the interface address of GE0/0 on MSR-1
C. Can't ping HostB on HostA
D. Can ping HostA on HostB
正解：A,B,C,D

質問 4：
The three MSR routers are connected as shown in the figure. 192.168.1.0/30 is the interconnection network segment between RTA and RTB, and 10.10.10.0/30 is the interconnection network segment between RTB and RTC.

OSPF is running on the interconnection interfaces of the three routers and all belong to Area 0. At the same time, only the three router interconnection interface network segments are published in Area 0.
Assuming that OSPF is operating normally and OSPF neighbors are established successfully, then ______. (Multiple choice)
A. After the OSPF neighbor status of the three routers is stable, the three routers have the same LSDB
B. There is no OSPF route in the RTB routing table
C. If the links between the three routers are all Ethernet, then there are at least two DRs in the network
D. If the links between the three routers are all Ethernet, there may only be one DR in the network
正解：A,B,C

質問 5：
There are two hops from the source device to the destination device. Use the tracert command to detect the path. When the first hop is detected, the source device sends a UDP packet with a TTL of 1 to a larger port of the destination device. When the packet reaches the middle hop, the TTL will change to 0, so the device responds to the source device. Respond to an ICMP______ message.
A. Echo Request
B. Time Exceeded
C. Port Unreachable
D. Echo Reply
正解：B