Ch18-Configuring IPv4 Addresses and Static Routes Flashcards
On an IP host, the IP address of some router to which the host sends packets when the packet’s destination address is on a sunset other than the local subnet
default gateway/router
A list of IP addresses of neighbors on the same VLAN, along with their MAC addresses, as kept in memory by hosts and routers
ARP table
A list of routes in a router, with each route listing the destination subnet and mask, the routers interface out which to forward packets destined for the subnet, and as needed, the next-hop routers IP address
routing table
In an IP routing table, part of a routing table entry that refers to the local interface out which the local router should forward packets that match the route.
Outgoing interface
Exit Interface
Egress interface
One of the virtual interfaces on a single physical interface
sub-interface
A configuration concept inside Cisco switches, used as an interface between IOS running on the switch and a VLAN supported inside the switch, so that the switch can assign an IP address and send packets into that VLAN
VLAN interface
A LAN switch that can also perform Layer3 routing functions.
Layer 3 switch
On a router, an IP route added to the routing table when the router interface is both up and has an IP address configured. The route is for the subnet that can be calculated given the configured IP address and mask
connected route
On a router, the route that is considered to match all packets that are not otherwise matches by some more specific route
default route
An IP route on a router created by the user configuring the details of that route on the local router
static route
A route with a /32 mask, which by virtue of this mask represents a route to a single host IP address
host route
A static IP route that uses a higher administrative distance than other routes, typically routes learned by a routing protocol. As a result, the router will not use the static route if the routing protocol route has been learned, but will use the static route if the routing protocol fails to learn the route
floating static route
A route for a classful network
network route
In Cisco routers, a means for one router to choose between multiple routes to reach the same subnet when those routes are learned by different routing protocols. A measure of the “trustworthiness” of learned routes. The lower its value, the better the source of the routing information
administrative distance
Command reference:
Global command to create a sub interface and to enter configuration mode for that sub interface
interface int-type-num.subint
Command reference:
A subinterface cmmand that tells the router to use 802.1Q trunking, for a particular VLAN, and with the native keyword, to not encapsulate in a trunking header.
encapsulation dot1q vland-id [native]