The two routers of the customer are connected back to back through V.35 cable, and one of the routers has the following interface information: [MSR-Serial0 / 0] display interface Serial 0/0

 The two routers of the customer are connected back to back through V.35 cable, and one of the routers has the following interface information: [MSR-Serial0 / 0] display interface Serial 0/0

Serial0/0 current state: UP

Line protocol current state: UP

Description: Serial6/0 Interface

The Maximum Transmit Unit is 1500 ， Hold timer is 10(sec)

Internet Address is 6.6.6.1/30 Primary

Link layer protocol is PPP

LCP opened ， IPCP opened

From the above information, you can know ______ . (Multiple choices)
A .  This router has completed PPP negotiation with the remote device and successfully established a PPP link
B .  The PPP PAP or CHAP authentication and verification options are successfully completed between this router and the remote device
C .  on this router can already ping through the peer address 6.6.6.2 that can not be judged by whether the verification, so the end does not necessarily address can ping through
D .  The interface information prompts that the second IP address subordinate can also be configured under this interface

View Answer

Answer:   AD