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NEW QUESTION 255
The well-known port number of the transport layer protocol used by DNS is ______.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION 256
On the MSR router, you can use the ______ command to clear the NAT session table entries.
- A. reset nat session
- B. clear nat session
- C. clear nat
- D. reset nat table
Answer: A
NEW QUESTION 257
A DNS client queries the local domain name server for the IP address of www.sina.com.cn, and the local domain name server usually responds by means of DNS query?
- A. Fuzzy query
- B. Iterative query
- C. Reverse query
- D. Recursive query
Answer: D
NEW QUESTION 258
The WAN link between the two routers MSR-1 and MSR-2 uses the PPP protocol, and RIP is configured on the two routers to advertise routing information to each other. At present, you can see the RIP routes advertised by MSR-2 on MSR-1, but you can't see any RIP routes in the routing table of MSR-2. The possible reason is ______. (Multiple choice)
- A. The RIP of MSR-2 is configured with silent-interface all
- B. The RIP of MSR-1 is configured with silent-interface all
- C. The RIP versions of the two routers are inconsistent
- D. MSR-1 only started RIP on the WAN interface, and did not start RIP on other interfaces
Answer: B,C,D
NEW QUESTION 259
Compared with the standard subnet division, the biggest difference between the variable length subnet mask division (VLSM) and it is ______.
- A. For a naturally classified IP network, a subnet mask of any length can be used for subnet division
- B. Can form a super network
- C. Use classless addresses for network division
- D. After subnetting a naturally classified IP network, the subnet mask length of each subnet can be different
Answer: D
NEW QUESTION 260
The two MSR30 routers of the customer are interconnected through the WAN interface S0/0, and PPP and RIP protocols are running at the same time. For security considerations, PPP PAP authentication and RIP plaintext authentication must be configured separately. Then the similarity between these two verification methods is ______.
- A. All pass clear text keywords on the Internet
- B. Both use 128bit key length
- C. Usernames and passwords are spread on the network in clear text
- D. Both are two handshake verification methods
Answer: A
NEW QUESTION 261
The following statement about the upgrade of H3C network equipment is correct ______. (Multiple choice)
- A. When using FTP to upgrade, the device can only be used as an FTP client
- B. Use Xmodem to upgrade to the same speed as FTP
- C. When the device cannot boot to the command line mode and needs to upgrade the operating system software, only the Xmodem method can be used
- D. In an environment where the complex interaction between the client and the server is not convenient, you can use TFTP to upgrade
Answer: D
NEW QUESTION 262
The basic process of Layer 2 forwarding of an Ethernet switch includes ______.
- A. If a match is found, but the port corresponding to the entry does not belong to the VLAN corresponding to the packet, then the frame is discarded;
- B. Add or refresh MAC address table entries according to the source MAC address and VLAN ID information of the received Ethernet frame;
- C. If a match is found and the port corresponding to the entry belongs to the VLAN corresponding to the packet, then the packet is forwarded to that port, but if the port corresponding to the entry is the same as the port that received the Ethernet frame, the packet is discarded. frame
- D. Search the MAC address table according to the destination MAC address, if no match is found, then broadcast in the VLAN corresponding to the message;
Answer: A,C,D
NEW QUESTION 263
IPv6 uses ______ notation to represent addresses.
- A. colon decimal
- B. colon hexadecimal
- C. dotted decimal
- D. dotted hexadecimal
Answer: B
NEW QUESTION 264
As shown in the figure, there are 4 ways to divide the OSPF area, which one is correct? (multiple choice)
- A. Picture 2
- B. Figure 4
- C. Figure 3
- D. Picture 1
Answer: A,B,C,D
NEW QUESTION 265
In the process of establishing a PPP session, when authentication is set and the authentication is passed, the PPP link enters the ______ phase.
- A. Network
- B. Terminate
- C. Authentication
- D. Dead
- E. Establish
Answer: A
NEW QUESTION 266
The number of available host addresses contained in the natural classification network segment corresponding to the IP address 165.110.20.67 is. (Please fill in Arabic numerals)
Answer:
Explanation:
65534
NEW QUESTION 267
On the MSR router, when you delete a file using the delete command without parameters, the deleted file will be saved in ______.
- A. Memory
- B. RAM
- C. ROM
- D. Recycle-bin
Answer: D
NEW QUESTION 268
The IP address 133.18.2.110 is the ______ address.
- A. Type A
- B. Type C
- C. Type B
- D. Class D
Answer: C
NEW QUESTION 269
The default subnet mask for class B addresses is ______.
- A. None of the above is correct
- B. 255.255.0.0
- C. 255.255.255.0
- D. 255.0.0.0
Answer: B
NEW QUESTION 270
The IPv4 address includes the network part, host part, subnet mask, etc. Correspondingly, the IPv6 address contains ______.
- A. Network part, host part, network length
- B. prefix, interface identifier, network length
- C. Network part, host part, prefix length
- D. prefix, interface identifier, prefix length
Answer: D
NEW QUESTION 271
After executing the display vlan 2 command on the switch SWA, the switch output is as follows:
<SWA> display vlan 2
VLAN ID: 2
VLAN Type: static
Route interface: not configured
Description: VLAN 0002
Tagged Ports: none
Untagged Ports:
Ethernet1/0/1 Ethernet1/0/3 Ethernet1/0/4
It can be judged from the above output ______. (Multiple choice)
- A. The current VLAN on the switch is only VLAN2 and Vlan1 must exist
- B. Port Ethernet1/0/1 is a Trunk port hybrid
- C. VLAN2 contains ports Ethernet1/0/1, Ethernet1/0/3 and Ethernet1/0/4
- D. Data frames with VLAN2 tags need to be stripped off when they leave port Ethernet1/0/3
Answer: C,D
NEW QUESTION 272
To set a subnet mask so that 192.168.0.94 and 192.168.0.116 are not in the same network segment, the subnet mask used may be ______. (Multiple choice)
- A. 255.255.255.240
- B. 255.255.255.192
- C. 255.255.255.224
- D. 255.255.255.248
Answer: A,C,D
NEW QUESTION 273
The following description of the characteristics of VTY in H3C equipment is correct ______.
- A. Each VTY user corresponds to a physical interface
- B. Only used to Telnet the device
- C. Each device can support simultaneous access by multiple VTY users
- D. No password authentication is not supported
Answer: C
NEW QUESTION 274
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