The following message about the Register in PIM-SM describes the correct? (Multiple choice questions).

• A.Register messages are sent to RPv via unicast instead of multicast
• B.The Register message is sent by the source DR
• C.The Register message enables the RP to learn the multicast source information
• D.The Register message is sent by the receiver router

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Two routers, connected together through the serial port, but can not ping between each other, now check the port status as follows:

Can the following information determine what the cause is?

• A.The IP addresses on both ends are not on the same network segment
• B.Subnet mask does not match the
• C.The link layer protocols on both ends are inconsistent
• D.Insufficient link bandwidth

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OSPF fast convergence is an extended feature to improve the convergence speed of routing, in which PRC works by speeding up routing computation by performing path calculations only on the affected nodes when the network topology changes.

• A.TRUE
• B.FALSE

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SNMPv3 defines which security features

• A.Privacy
• B.Authentication
• C.Domain checking
• D.Accounting

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Regarding BGP route filtering, the following description is wrong?

• A.For routes published locally, configure a routing policy that takes effect before the route is added to the BGP route table.
• B.When a route to a BGP peer is received, a routing policy is enforced to filter unwanted BGP routes that are not added to the local BGP routing table.
• C.In the same node of Route-Policy, multiple if-match clauses for different attributes are "or" relationships.
• D.The filtering relationship between Route-Policy's noodes is "or.", that is, as long as a node filter is passed, it can pass through the Route-policyo

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