多选题Which two signaling protocols could be used in VPLS to advertise site information between PEs? （）AIKEBBGPCRSVPDLDP

第1题：

第2题：

Which two primary port authentication protocols are used with VSANs？（）

• A、SPAP
• B、CHAP
• C、DHCHAP
• D、ESP

第3题：

第4题：

Which of the following routing protocols are unable to advertise CIDR networks?（） (Select TWO)

• A、OSPF
• B、RIP
• C、EIGRP
• D、IGRP
• E、RIPv2

第5题：

Which two implementations are standard Virtual Private LAN Service （VPLS） implementations that aresupported by the IETF？（）

• A、VPLS uses LDP for signaling.
• B、VPLS uses BGP for autodiscovery and signaling.
• C、VPLS uses extended IS-IS for signaling
• D、VPLS uses OSPF version 3 for auto discovery and signaling
• E、VPLS uses spanning tree for signaling

第6题：

Which two features prevent routing loops between the OSPF sites of a customer when the sites aremultihomed or a backdoor link is used between the sites？ （）

• A、sham link
• B、down bit
• C、virtual link
• D、Site of Origin
• E、domain tag

第7题：

The network administrator must complete the connection between the RTA of the XYZ Company and the service provider. To accomplish this task, which two devices could be installed at the customer site to provide a connection through the local loop to the central office of the provider (Choose two.)（）。

• A、WAN switch
• B、PVC
• C、ATM switch
• D、multiplexer
• E、CSU/DSU
• F、modem

第8题：

第9题：

Which one of the WAN data-link protocols below is used for out-of-band signaling?（）

• A、HDLC
• B、NCP
• C、PAP
• D、LAPD
• E、LAPB
• F、None of the above

第10题：

Which of the following protocols is used to encrypt data between web servers and web browsers?（）

• A、SMTP
• B、SIP
• C、HTTP
• D、SSL