A.To maintain multiple physical links

B.IP address negotiation

C.IPX address negotiation

D.To establish, maintain and terminate the point-to-point connection

A.In the network, there are some sub networks such as 110.1.1.0/24,110.1.2.0/24,110.1.3.0/24, 120.1.1.0/24,120.1.2.0/24 ,120.1.3.0/24.Then all the routers belonging to 110 network can be configured in one area.

B.One network maybe includes high-end, mid-end and low-end routers. Generally, all of these routers will be in same area.

C.Make all routers with larger routing-table into one area.

D.If the ISP runs OSPF protocol in the whole province network, then one city can be taken as one area.

A.True

B.False

A.224.0.0.0-224.0.0.255

B.239.0.0.0-239.0.0.255

C.224.0.0.0-239.255.255.255

D.224.0.1.0-238.255.255.255

A.In addition, the centralized control mode of the controller and the distribution control mode of the forwarder are supported, and the balance between centralized control and distributed control is provided.

B.By extending existing protocols (such as IGP), the existing network can be smoothly evolved.

C.Uses the source routing technology to provide fast interaction between the network and upper-layer applications.

D.Segment Routing is a connection-oriented technology that maintains the connection status.