The following commands were executed on an MSR router:
[MSR]display ip routing-table 100.1.1.1
Then the correct description of this command is ______.

• A.It is possible that the output of this command is two default routes
• B.This command is incorrect because it does not contain mask information
• C.You can view the routing entries that match the next hop address as 100.1.1.1
• D.You can view the routing items that match the destination address of 100.1.1.1

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In the process of establishing a PPP session, when the physical layer is unavailable, the PPP link is in the ______ phase.

• A.Network
• B.Establish
• C.Dead
• D.Terminate
• E.Authentication

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After configuring NAPT, it is found that some internal network addresses can always ping the external network, while others cannot. The possible reasons are ______.

• A.The NAT address pool has only one address
• B.Insufficient NAT device performance
• C.NAT configuration does not take effect
• D.ACL setting is incorrect

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The XYZ company administrator is subnetting the office network. It is required to divide a Class C network segment into several equal-sized subnets for office users in various departments, but there is no limit to the size of the subnets. There are ____ division methods. (Please fill in Arabic numerals)

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Which of the following statements about IP addresses are correct is ______. (Multiple choice)

• A.IP address consists of two parts: network number and host number
• B.The IP address with all 1s in the host number is called the network address, which is used to identify all hosts on a network
• C.The first byte of class A address is 0~126 (127 is reserved for other use)
• D.IP address is usually expressed in dotted decimal notation, for example: 10.110.168.121

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