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

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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

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

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