Lesson 7A Flashcards
What is a routing table and what does it do?
A routing table is a list of directions that a router uses to decide where to send data packets. It includes information like the protocol, destination, interface, and gateway/next hop.
What are the four main types of routes in a routing table?
The four main types of routes are direct network routes, remote network routes, host routes, and default routes
What are remote network routes?
Remote network routes are paths to networks that are not directly connected to the router. The router reaches these networks through other routers.
What are direct network routes?
Direct network routes are the paths to networks directly connected to the router’s interfaces. These routes are automatically added to the routing table.
What are host routes?
Host routes are specific paths to individual IP addresses. They have a /32 network prefix, meaning they are very precise routes
What is a default route?
A default route is a special type of static route that the router uses when it doesn’t have an exact match for the destination. It’s represented by 0.0.0.0/0 for IPv4 or ::/0 for IPv6.
What is a static route?
A static route is a manually added path in the routing table. It doesn’t change unless edited by the administrator and can be either non-persistent or persistent.
What is the difference between non-persistent and persistent static routes?
A non-persistent static route disappears when the router restarts. A persistent static route stays in the routing table even after a restart.
How are the routing tables for routers A, B, and C configured in a series?
How are the routing tables for routers A, B, and C configured in a series?
What is the role of a router in a network?
A router is a device that connects multiple networks and directs data packets between them. It uses the routing table to decide the best path for each packet.
What does a router do with a packet?
A router looks at the destination address on the packet, checks its routing table to find where to send it, and then forwards it to the next place.
What is a hop in networking?
A hop is each time a packet moves from one router to another. For example, if a packet goes through 3 routers, that’s 3 hops.
What is a packet in networking?
A packet is a small piece of data sent over a network. Think of it like a letter in the mail, which carries information to its destination.
What is ARP and why is it used?
ARP (Address Resolution Protocol) is used in IPv4 to find the exact address of a device on the local network. It’s like looking up a house number to deliver a letter.
What is TTL in networking?
TTL (Time To Live) is a number in a packet that decreases by 1 each time it goes through a router. When TTL hits 0, the packet is discarded to prevent endless looping.
