多项选择题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.


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1.多项选择题Which two features must be configured to perform AToM NSF?()

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

2.多项选择题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

3.多项选择题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

4.单项选择题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

5.多项选择题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.

6.单项选择题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

7.单项选择题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

8.多项选择题Which three configuration options are available for configuring the l2tp-class command in L2TPv3?()

A.TCP port
B.authentication
C.IP DF bit
D.retransmit retries
E.sequencing
F.hostname

9.单项选择题Which BGP attribute can be used to influence inbound traffic flow?()

A.cluster ID
B.Weight
C.MED
D.local preference
E.aggregate

10.多项选择题What are the two benefits of graceful restart?()

A.Graceful restart allows session information recovery without disruption to the network.
B.A node can perform a graceful restart to help a neighbor recover its state. The label bindings are kepton state information, which helps the failed node recover faster and does notaffect the current for wardtraffic.
C.Graceful restart allows a node to recover state from its neighbor when there is no RP or before thedevice undergoes SSO.
D.Graceful restart does not allow session information recovery.
E.During a graceful restart, the router removes any stale prefixes after a timer for stale entries expires