Topic #12: Routing Flashcards
The process of selecting a path a path across one or more networks
Network Routing
If the Gateway is not configured where can the device communicate?
within the local LAN
A command used to routing details
netstat -r or route print
What is the first router interface a packet would encounter if it
left your PC?
The IP address of that interface on the router
becomes your default gate in the PC.
3 Main Features of the Network Layer
- Destination Network
- Next-Hop
- Metric
the process a router performs when making forwarding decisions for each packet arriving at the gateway
routing
Functions of a Router
- select “best path”
- switch packet to the proper port
- exact host < exact network
this is the path the router sends if it does not have the destination network in the routing table
default route
If there is no default route
Packets are dropped
The address of the device that will process the packet next
next hop
For all packets destined for another network, what is the next hop
the address of the default gateway
Types of routing
Static
Dynamic
route information is manually configured
static route
route information is learned from other routers in the same internetwork
dynamic routing
pros of static routing
- reliable
- does not use much overhead in processing packets
cons of static routing
- does not update automatically
- higher administrative costs
pros of dynamic routing
- up to date routing tables
- little administrative cost after initial setup
cons of dynamic routing
- consumes bandwidth
- higher router processing overhead
set of rules by which routers dynamically share routing information
routing protocols
RIP
Routing Information Protocol
EIGRP
Enhanced Interior Gateway Protocol
OSPF
Open Shortest Path First
