单选题
Once the TCP connection is established, which message type initiates the BGP peering process?（）
Open
Active
Update
Keepalive
Notification
单选题
During OSPF adjacency formation, in what state is a router when it is negotiating to be in charge of the database synchronization process?（）
Init
2Way
ExStart
Exchange
单选题
Why would you make a non-backbone area a stub or not-so-stubby area?（）
to aggregate routes learned from the ABR
to lower the cost of routes advertised by the ABR
to connect a non-contiguous area to the backbone
to decrease the size of the link-state database in that area
单选题
What command would you use to view an IS-IS adjacency?（）
show iso neighbor
show isis neighbor
show iso adjacency
show isis adjacency
单选题
What type of OSPF router is responsible for redistributing routes into OSPF?（）
ABR
ASBR
internal router
backbone router
单选题
What is the purpose of the OSPF link-state update packet?（）
describes a change to the OSPF hello timer
carries one or more link-state advertisements
establishes and maintains neighbor relationships
describes the contents of the entire link-state database
单选题
If all OSPF routers on a broadcast network have the same OSPF priority, what parameter is used to determine the new BDR at the time of a DR failure?（）
area ID
router ID
loopback address
IP address of interface on broadcast network
多选题
A firewall filter is applied as an input filter on a transit interface. What three types of traffic will this affect? （）
inbound traffic transiting the router
outbound traffic transiting the router
traffic destined to the Routing Engine
traffic destined to the interface address on which the filter is applied
多选题
What are two purposes of the AS_PATH attribute?（）
route selection
loop avoidance
determining equal cost paths for reachablilty
defining the application of other BGP attributes
