单项选择题
A. A partial mesh totaling 100: one between the central - site router and each of the 100 branches.
B. A full mesh - (101 * 100) / 2 = 5050 - One neighborship between each pair of routers.
C. 101 - One between each router (including the central site) a nd its nearby PE router.
D. None of the answers is correct.
多项选择题 Refer to the exhibit. Which two statements are true about the partial configuration that is shown? （）
多项选择题 Which three of the following protocols will be forwarded to a host specified by the ip helper - address interface configuration command if the configuration has not been modified by the ip forward - protocol udp global con figuration command?（）
单项选择题 Refer to the exhibit. Routers R1 and R2 have established a neighbor relationship and are exchanging routing information. The network design requires that R1 r eceive routing updates from R2, but not advertise any routes to R2. Which configuration command sequence will successfully accomplish this task? （）