多项选择题
A. ip default-gateway 0.0.0.0
B. ip route 172.16.2.1 0.0.0.0 0.0.0.0
C. ip default-network 0.0.0.0
D. ip default-route 0.0.0.0 0.0.0.0 172.16.2.1
E. ip route 0.0.0.0 0.0.0.0 172.16.2.1
多项选择题 Workstation A has been assigned an IP address of 192.0.2.24/28. Workstation B has been assigned an IP address of 192.0.2.100/28. The two workstations are connected with a straight-through cable. Attempts to ping between the hosts are unsuccessful. What two things can be done to allow communications between the hosts? （）
多项选择题 Which two addresses can be assigned to a host with a subnet mask of 255.255.254.0？（）
单项选择题 The network default gateway applying to a host by DHCP is 192.168.5.33/28.Which option is the valid IP address of this host？（）