TCP or UDP port
source and destination IP address
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
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
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
单选题 Three IS-IS routers on a broadcast segment have different priority values configured. Which router is elected the DIS on that broadcast segment?（）
the router with the lowest priority
the router with the highest priority
the router with the highest System ID
the router with the highest IP address
The local router prefers the route with the shortest as-path.
The router first verifies that it has a route to the bgp Next Hop IP address.
The local router prefers the route from the peer with the lowest peer id address.
The local router prefers the route learned from an ebgp peer over a route learned from an ibgp peer.
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?（）
3 seconds for DIS; 9 seconds for non-DIS
9 seconds for DIS; 3 seconds for non-DIS
10 seconds for DIS; 3 seconds for non-DIS
10 seconds for all routers