and you simply press Enter, the IOS resumes the connection to the most recently suspended
Telnet connection. That is fine, until you realize how much you tend to press the Enter key
occasionally to clear some of the clutter from the screen. With a suspended Telnet connection,
you also just happened to reconnect to another router. This is particularly dangerous when you
are changing the configuration or using potentially damaging EXEC commands--be careful
about what router you are actually using when you type the command.
general term that refers to the choices that the router can make when no match exists between
the routing table and the destination address of a packet. Without any default routes, a packet
whose destination is not matched in the routing table is discarded.
and R3 are connected to the rest of this network only via R1's Token Ring interface. If R2 and
R3 could forward packets meant for unknown destinations to R1, and if R1 knew to send them
to router Dist1, then all three routers could deliver packets to the rest of the network without
actually needing to route to all the other networks subnets in their routing tables.