A.Supports Layer 3 networking and smooth evolution to LTE, protecting customers' investment.

B.One network, one set of O&M, full service bearing, lowest network construction cost and O&M cost; Visualized O&M, Reducing O&M Costs and Simple and Efficient.

C.Oriented to FMC and Adapted to Future Development Requirements.

D.Based on a unified router platform and a unified VRP platform, IP RAN is compatible with PTN products.

A.Signaling

B.Packet forwarding

C.Path calculation

D.Information distribution

A.4s

B.6s

C.2s

D.9s

A.False

B.True

A.LAN switch operates at data link layer.

B.LAN switch will modify the network layer header of the packet and then forward it.

C.LAN switch will modify the data link layer header of the packet and then forward it.

D.LAN switch can learn Mac address automatically.