多項(xiàng)選擇題Which three statements about OSPF partial SPF are true?()

A.If it is triggered by Type 4, all Type 4 LSAs that announce a certain ASBR and all Type 5 and 7 LSAs are processed
B.If it is triggered by Types 5 and 7, all Type 5 and 7 LSAs that contribute to a certain destination are processed.
C.If it is triggered by Type 2, all Type 2 LSAs that contribute to a certain destination are processed.
D.If it is triggered by the change of Type 3, 4, 5, and 7 LSAs.
E.If it is triggered by the change of Type 2, 3, 5, and 7 LSAs


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1.多項(xiàng)選擇題Which four statements about NetFlow are true?()

A.NetFlow records bidirectional IP traffic flow.
B.NetFlow export can be implemented over IPv4.
C.NetFlow export can be implemented over IPv6.
D.NetFlow records multicast IP traffic flow.
E.NetFlow records ingress traffic.
F.NetFlow records egress traffic.

2.單項(xiàng)選擇題Which statement about PIM sparse mode operations is true?()

A.It does not support all underlying unicast routing protocols like BGP
B.Receivers are registered with RP by their first hop router
C.From the RP, traffic flows down a source tree to each receiver.
D.It supports shared trees only, and assumes all hosts want the multicast traffic
E.Receivers are joined to the shared tree by their local designated router

3.多項(xiàng)選擇題Which statements about the Route Target Rewrite feature are not true? ()

A.After the route target replacement policy is applied to the target router, the BGP session need not be refreshed manually to put the policy into operation.
B.Route Target Rewrite allows the administration of the routing policy to stay local to the AS.
C.Route target replacement is always done by the ASBR.
D.Route target rewrites are supported for VRF export maps.
E.Route target replacement can be done on incoming and outgoing BGP updates.

4.多項(xiàng)選擇題Which two features must be configured to perform AToM NSF?()

A.FRR
B.SSO
C.distribute CEF
D.switch virtual path
E.graceful restart

5.多項(xiàng)選擇題Which two statements about forwarding equivalence class (FEC) are true?()

A.FEC might correspond to a destination IP subnet, but it might also correspond to any traffic class that the edge LSR considers significant.
B.FEC is a group of IP packets that is forwarded over a different path, but with the same forwarding treatment.
C.FEC is a group of IP packets that is forwarded over the same path, and with the same forwarding treatment.
D.FEC is a group of IP packets that is forwarded over a different path, but with the different forwarding treatment.
E.FEC is a group of IP packets that is forwarded over the same path, but with a different forwarding treatment

6.多項(xiàng)選擇題Which four of these key points should be considered during implementation of PPPoA architecture?()

A.the number of subscribers that will be serviced currently and in the future because this affects the number of required PPPoA sessions
B.The types of applications that the NSP offers to the end subscriber
C.The capacity of ATM and Frame Relay interworking on the NSP
D.in the case of more than one user, whether all users need to reach the same final destination orservice,or they all have different service destinations
E.Whether the service provider or the final service destination is providing the IP address to the CPE of the subscriber

7.單項(xiàng)選擇題Where is the MPLS label imposed?()

A.after the Layer 3 header and before the Layer 2 payload
B.after the Layer 3 header and before the Layer 4 payload
C.after the Layer 2 header and before the Layer 1 payload
D.after the Layer 1 header and before the Layer 2 payload
E.after the Layer 2 header and before the Layer 3 payload

8.多項(xiàng)選擇題Which three statements about the BGP next-hop attribute are true? ()

A.EBGP sessions between confederation sub ASs do not modify the next-hop attribute.
B.By default, iBGP sessions change the next-hop attribute learned from eBGP peers to self address.
C.By default, the next-hop attribute is not changed when a prefix is reflected by the route reflector
D.EBGP sessions between confederation sub ASs change the next-hop attribute to peer address.
E.By default, iBGP sessions preserve the next-hop attribute learned from eBGP peers.

9.單項(xiàng)選擇題What is the port number of the IPsec Authentication Header packet?()

A.IP protocol 50
B.TCP port 51
C.UDP port 50
D.IP protocol 51
E.UDP port 51
F.TCP port 50

10.單項(xiàng)選擇題What does the protocol field inside the PPP frame indicate?()

A.the protocol used to determine the authentication method
B.the protocol used to identify the data in the Information field
C.the protocol used to carry the PPP frame
D.the protocol used to decode the FCS field
E.the protocol used to detect the number of padding bytes