单项选择题
A.speed B.DTP negotiation settings C.trunk encapsulation D.duplex
A.HMAC-MD5 B.HMAC-SHA C.CBC-DES D.community strings
A.It requires the use of ARP. B.It can support multiple IPv6 subnets on a single link. C.It supports up to 2 instances of OSPFv3 over a common link. D.It routes over links rather than over networks.