The three autonomous systems AS200 shown in the figure are the filtering ASs of AS100 and AS300, among which AS100 advertises the route 10.1.1.0/24 to AS200.
The main device configuration is as follows:
RTC
bgp 100
network 10.1.1.0 255.255.255.0
undo snchronization
peer 200.1.2.2 as-number 200
peer 200.1.2.2 route-policCOM export
peer 200.1.2.2 advertise-communit#
route-policCOM permit node 10
applcommunit100:100
#
RTB
#
bgp 200
undo snchronization
peer 200.1.2.1 as-number 100
peer 200.1.3.2 as-number 300
peer 200.1.2.1 route-policCOM import
#
route-policCOM permit node 10
if-match communit10
applcommunit200:200
#
ip communit-list 10 permit 100:100
Then on the RTC, the correct statement about the routing of 10.1.1.0/24 is ____.

• A.Its community attribute is <100:100> because the community attribute represents the source of the route.
• B.Its community attribute is empty because the community attribute will not be passed to the external AS.
• C.Its community attribute is <200:200> because the community attribute was changed by the intermediate AS.
• D.Its community attribute is <100:100> , <200:200> , because the community attribute is actually appended by the intermediate AS.

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______ uses the Shortest Path First (SPF) algorithm.

• A.S-IS
• B.OSPF
• C.RIP
• D.BGP

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The networking is shown in the figure, RTB advertises route 13.14.3.0/24 to RTA, LP is 150, MED is 50. Route received by RTC from RTA
What is the LP and MED of 13.14.3.0/24?

• A.No LP, MED 50
• B.LP 100 , no MED
• C.LP 150 , MED 50
• D.No LP, no MED

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Which of the following statements are true about the command import-route ?

• A.Using the command import-route, only EBGP routes can be imported into the IGP routing domain
• B.Use the command import-route bgp to import both EBGP and IBGP routes into the IGP routing domain
• C.Use the command import-route allow ibgp, only ibgp routes can be imported into the IGP routing domain
• D.Use the command import-route allow ibgp to import EBGP routes and IBGP routes into the IGP routing domain

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As shown in the figure, RTA and RTB act as border routers between the BGP routing domain and the OSPF routing domain.
In order to realize the routing intercommunication between the BGP routing domain and the OSPF routing domain, the following route distribution strategy is not feasible: _______

• A.Two-way import of OSPF and BGP are performed on RTA and RTB respectively, and appropriate routing filtering strategies must be adopted to avoid routing loops and sub-optimal path problems.
• B.Adjust the OSPF external routing priority on RTA and RTB to make it less than the BGP routing priority; import BGP routes into OSPF on RTA and RTB, and advertise the routes in the OSPF domain to BGP via the network command
• C.Adjust the OSPF external routing priority on RTA and RTB to make it greater than the BGP routing priority; import BGP routes into OSPF on RTA and RTB, and advertise the routes in the OSPF domain to BGP via the network command
• D.Two-way introduction of OSPF and BGP is done on RTA and RTB respectively, without the need to consider loops and sub-optimal paths.

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