2024年6月11日发(作者：)

R1#show hosts

Default domain is

Name/address lookup uses domain service

Name servers are 12.1.1.1

Host Port Flags Age Type Address(es)

R4 None (perm, OK) 0 IP 34.1.1.4

R3 None (perm, OK) 0 IP 13.1.1.3

R2 None (perm, OK) 0 IP 12.1.1.2

R1 None (perm, OK) 0 IP 12.1.1.1

R1#ping R2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 12.1.1.2, timeout is 2 seconds:

Success rate is 100 percent (5/5), round-trip min/avg/max = 4/7/8 ms

R1#telnet R2

Trying R2 (12.1.1.2)... Open

User Access Verification

Password:

R2>EN

Password:

R2#exit

[Connection to R2 closed by foreign host]

R1#