A network administrator needs to configure a serial link between the main office and a remote location. The router at the remote office is a non-Cisco router. How should the network administrator conf

Question

Options

• AMain(config)# interface serial 0/0 Main(config)# ip address 172.16.1.1 255.255.255.252 Main(config)# no shut
• BMain(config)# interface serial 0/0 Main(config)# ip address 172.16.1.1 255.255.255.252 Main(config)# encapsulation PPP Main(config)# no shut
• CMain(config)# interface serial 0/0 Main(config)# ip address 172.16.1.1 255.255.255.252 Main(config)# encapsulation frame-relay Main(config)# authentication chap Main(config)# no shut
• DMain(config)# interface serial 0/0 Main(config)# ip address 172.16.1.1 255.255.255.252 Main(config)# encapsulation Ietf Main(config)# no shut

• A
  5% (1)
• B
  82% (18)
• C
  9% (2)
• D
  5% (1)

Explanation

When connecting a Cisco router to a non-Cisco router over a serial link, you must use PPP encapsulation instead of the default Cisco HDLC. This is because Cisco's HDLC implementation includes a proprietary field that non-Cisco devices do not understand, making it incompatible. PPP is an open, vendor-neutral standard that any compliant router supports. Option B is correct because it configures the IP address and explicitly sets 'encapsulation PPP', then enables the interface. Option A uses the default Cisco HDLC which would fail with a non-Cisco router. Options C and D are incorrect configurations.

No community discussion yet for this question.