| A | B |
|---|
| An IP address and a subnet mask on an interface achieve three purposes: | ยท 1) They enable the system to process the receipt and transmission of packets. 2) They specify the device's local address. 3) They specify a range of addresses that share the cable with the device. |
| What command do you use to establish the logical network address of an interface | ip address command |
| What command do you use to specify the format of network masks for the current session (note options are: bit count; dotted-decimal[default]; hex) | term ip netmask-format command |
| What command do you use to make a static name-to-address entry in the router's configuration file | ip host command |
| What command do you use to define which hosts can provide the name service | ip name-server command |
| How do you enable DNS on a router | DNS is enabled by default |
| How do you disable DNS | The router(config)# no ip domain-lookup command turns off name-to-address translation in the router |
| What command do you use to display a cached list of host names and addresses | show hosts command |
| Verification commands | Telenet, PING, Trace |
| telnet | verifies the application layer software between source and destination stations; is the most complete testing mechanism available |
| ping | uses the ICMP protocol to verify the hardware connection and the logical address at the internet layer; is a very basic testing mechanism |
| trace | uses TTL values to generate messages from each router used along the path; is very powerful in its ability to locate failures in the path from the source to the destination |
| Ping character definitions | (1) ! - successful receipt of an echo reply; (2) . - timed out waiting for datagram reply (3) U - destination unreachable error (4) C - congestion-experienced packet (5) I - ping interrupted (e.g. Ctrl-Shift-6 X) (6) ? - packet type unknown (7) & - packet TTL exceeded |
