NET-07-P1 IPv4 & IPv6 Static Routing Flashcards
How does a Router Operate?
One of the router’s main jobs is to select the best path for a packet. The decision is based on its destination address
In the first step, the router decides whether to process a packet or ignore it. Routers will ignore packets with errors or packets they don’t know how to process
Packet Forwarding Review: Examiniation
In the second step, The router examines the Layer 2 address to decide if the packet was intended for itself (the default gateway), and verifies the integrity of the frame using the FCS (Layer 2 trailer)
Packet Forwarding Review: Decapsulation
In the third step, the router decides where to forward the packet to, based on its destination IP address and the routing table
Packet Forwarding Review: Decision-Making
In the fourth step, the router re-encapsulates the packet with new Layer 2 headers for the next hop (MAC address of the next hop), according tot eh decision made in step 3
Packet Forwarding Review: Encapsulation
In the fifth step, after a decision is made, the router forwards the packet to the interface from which the packet must exit
Packet Forwarding Review: Forwarding
Any network that is note connected locally to the router
Remote Network
User enters every network manually in the routing table
Static method
the router automatically learns the remote network from the routing tables of adjacent routers, by using various protocols
Dynamic Method
When to Use static routing
Network administrators decide if and when to use Static Routing, based on network requirements
is a better choice when routing to and from stub networks. consist of a single router that sends and receives non-local traffic via a single path
Stub Networks
is simple and secure and saves resources, it does not provide a sufficient level of scalability in larger networks
Small networks
Manually configured route that forwards traffic to a specific network
Standard Static Route
Typically used as a Gateway of Last Resort, which is used for any packet that does not have a destination route in the routing table
Default Static Route