Online Access Free H12-821_V1.0-ENU Exam Questions

Please pair the following backup technologies to ensure the reliability of machine A's network with their corresponding features.

Correct Answer:

Which of the following options is not the purpose of OSPF Hello message exchange?

• A.Deliver link status information
• B.Check if neighbor is alive
• C.Negotiate some necessary parameters
• D.Discover neighbor routers

Which of the following descriptions about the next-hop application of routing in BGP are correct?
(Multiple choice)

• A.You can use the peer X.X.X.Xnext-hop-local command to modify the next hop address when advertising routes to lBGP peers
• B.By default, no next-hop iteration routing policy is configured
• C.By default, when BGP advertises imported IGP routes to IBGP peers, it changes the next hop attribute to its own interface address
• D.The next hop attribute of BGP is different from that of IGP, not necessarily the IP address of the adjacent device

Which of the following descriptions of message authentication methods in IS-IS are correct?
(Multiple choice)

• A.Plain text authentication adds the password directly to the message, which has very low security.
• B.Keychain authenticates the password list that changes over time to further improve network security
• C.MD5 authentication can perform the MD5 algorithm on the configured password and then add it to the message, which improves the security of the password.
• D.IS-IS carries authentication information in the form of TLV, and the type of authentication TLV is 2

When configuring dual-link hot backup in a WLAN network, the larger the value of the configured AC priority, the higher the actual priority of the AC.

• A.FALSE
• B.TRUE