IP Addressing and Routing Flashcards Preview

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Flashcards in IP Addressing and Routing Deck (12):
1

ARP

stands for Address Resolution Protocol and it dynamically learns the data link address of an IP host connected to a LAN

2

If a device wants to communicate using TCP/IP, it needs .....

an IP address

3

Another term for octet

Byte

4

This must be true if all IP addresses are in the same group....

The IP addresses are not separated from each other by a router

5

IP addresses separated from each other by a router must be ......

in different groups

6

IPv4 Host Routing basics:

If the dest. IP address is in the same subnet, send directly to destination host; if not, send it to the default gateway

7

Router forwarding logic basics

1. Use FCS field to ensure error free delivery
2. If frame has no errors, discard old header and trailer, exposing IP packet
3. Compare IP packet's destination IP to the routing table
4. Encapsulate in new dll header and trailer

8

Objectives of routing table

To dynamically learn and fill its table with a route to each subnet
Find the best routes
Manage and replace lost routes if available
Prevent routing loops

9

Same general steps for learning routes

1. Each router adds a route to its table for each directly connected subnet
2. Informs neighbors about its routes; it also learns routes from other routers

10

ARP Request

a message that asks the simple request "if this is your IP address, please reply with your MAC address."

11

ARP Reply

a message that lists both the original IP address and the matching MAC address

12

ping

primary tool for testing basic network connectivity