Regarding the introduction of routes, which of the following description is wrong?

• A.bgp supports both import and network when generating routes. Network mode is more accurate.
• B.Introducing IBGP routes in OSPF may cause routing loops.
• C.By default, the default metric of the external route redistributed by OSPF is 1, and the imported external route type is Type2.
• D.After ISIS's level-2 network route is imported to the level-1 network, if the import policy is not manually configured, a routing loop is formed.

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The interface Serial0 of an existing router goes to OSPF and sets the interface Serial0 to the Silent interface. What effect does this setting have?

• A.OSPF does not establish any adjacencies through the interface.
• B.OSPF establishes available adjacencies through this interface.
• C.OSPF does not add routes learned from the interface to the local routing table.
• D.OSPF will receive routing updates from neighbors

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The HW network consists of Network A and B that are connected via Router HW1 and Router HW2. The HW network is shown in the following exhibit.

To set up an IPSec VPN between routers HW1 and HW2, which of the following crypto access-lists must be configured on Router HW1 in order to send LAN to LAN traffic across the encrypted VPN tunnel?

• A.rule permit ip source 10.1.1.0 0.0.0.255 destination 10.1.2.0 0.0.0.255
• B.rule permit ip source 10.1.1.0 0.0.0.255 destination 192.168.1.2 0
• C.rule permit ip source 10.1.2.0 0.0.0.255 destination 10.1.1.0 0.0.0.255
• D.rule permit ip source 192.168.1.10 destination 192.168.1.2 0
• E.rule permit ip source 192.168.1.10 destination 10.1.2.0 0.0.0.255

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RD is used to distinguish the same IP address in different VPNs. How many bits does the RD contain?

• A.16
• B.32
• C.64
• D.128

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In the case of not dividing the area, which of the following description of the link state routing protocol is correct? (Multiple choice)

• A.Each router establishes a topology of the entire flood domain
• B.Each router learns the route directly from the routing update and adds it to the routing table.
• C.The router will send all link state information from one neighbor to all other neighbors to ensure the synchronization of the database.
• D.Routers in the flooding domain may repeatedly receive the same link state information.
• E.Routers in the entire flooding domain have the same link state database

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