2.1 Routing Technologies Flashcards
Dynamic Routing
Border Gateway Protocol (BGP)
Between companies (internet)
Best path between networks
path vector protocol
Dynamic Routing
Enhanced Interior Gateway Routing Protocol (EIGRP)
Cistco Proprietary
Used inside a company’s private network
fast and efficient
Support unequal cost load balancing
Uses Diffusing Update Algorithm (DUAL)
Dynamic routing
Open Shortest Path First (OSPF)
Standard Protocol
Inside Company
Link-state protocol(shares full map of network with other routers)
calculates shortest path using dikstra’s algorithm
What is NAT?
Network Address Translation
Translate Private IP address into public IP address when going to the in
What is PAT
Port Address Translation
NAT but smarter
Uses one public IP address but tracks traffic using port numbers
Prefix Lengths
Most specific route ‘wins’
Combination of subnet ID and prefix length
Pick route to address 192.168.1.6
192.168.0.0/16
192.168.1.6/32
Administrative distance
Used by router to determine which routing protocol has priority
First Hop Redundancy Protocol(FHRP)
Family of Protocols that makes VIP failover happen automatically. Routers talk amoung themselves, elect and active device and standby backup devices.
Virtual IP (VIP)
Virtual IP that is not tied to a single physical device. If a active device fails, another device takes over VIP
Sub interfaces
Virtual interfaces created inside a single physical network interface
Metric
Determine Best path within a single routing protocol
Route Poisoning
Prevent Router from sending packets through a route that has become invalid within computer networks
VIP
Used for load balancing and redundancy. Other Routers can take over the workload or share the workload of 1 single VIP
OBJ 2.2
Duplex Mode
Enables the server and switch to send and receive data simultaneously, maximise data transfer efficiency for large, bidirectional traffic
OBJ 2.3
Ad Hoc
Direct communication between devices without the need for central infrastructure
