As shown below, what routes will R2 learn?( Single choice questions).

• A.R2 can receive an LSP for R1, but cannot join to the routing table.
• B.R2 can learn the 101.20/24 and 101.30/24 routes.
• C.R2 can learn all routes to R1.
• D.R2 can learn the 101.1.0/24 route.

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The following statement about IPSec VPN is correct ?qo

• A.Two routers establish an IPSec VPN in brutal mode, so that the two devices can interact with a minimum of 4 messages to establish a tunnel.
• B.The two routers establish IPSecVPN in main mode, and from the 5th packet (included), the payload's data will be encrypted.
• C.The two routers can establish OSPF neighbor relations and exchange intranet routes through the IPSec VPN tunnel
• D.Brutal mode can support NAT traversal, while main mode does not support NAT traversal.

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A campus deployed both IPv4 and IPv6 networks for service testing, and ran IS-S to interconnect the networks. (The S-S routing protocol has good scalability and is widely used in the live network.) Regarding IS-IS extensibility, which of the following statements is true?

• A.NLPID is a new type of TLV added by IS-IS to support IPv6
• B.IS-IS uses the TLV structure to build messages, making lS-IS more flexible and extensible
• C.For IS-IS, adding new features simply adds a new TLV to
• D.In order to support IPv6, IS-IS needs to add TLV to carry IPv6 address information

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View the IGMP configuration of the interface on the router RTA as follows, and the information about the operation of the RTA is incorrect

• A.The maximum response time for query messages is 10 seconds
• B.The packet interval for a particular group query is 60 seconds
• C.The IGMP protocol version is 2
• D.The interface IP address is 1921681.1

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VPN instances are also known as VPN routing forwarding tables (PN Routing and Forwarding table), and there are multiple route forwarding tables on the PE, including a public route forwarding table, one or more VPN route forwarding tables, and VPNv4 Route forwarding table.

• A.False
• B.TRUE

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