Chapter 4 Flashcards - Sheet1 Preview

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Flashcards in Chapter 4 Flashcards - Sheet1 Deck (31):
1

Two protocol options for the network layer

ipv4, ipv6

2

IP priority

data, in the form of IP packets, from the source host to the destination host

3

ip packet

An IP header, followed by the data encapsulated after the IP header, but specifically not including
any headers and trailers for layers below the network layer.

4

end-user computers in a TCP/IP network

hosts

5

Default Gateway AKA

Default router

6

Contents of an IP routing table

Address groupings (IP networks, IP subnets) and which interface leads to which

7

Size of the IP header

20 bytes

8

routing protocol

protocol used to exchange route information about the network with other routers

9

Bits in an IP address

32

10

DDN

Dotted-decimal notation. The format used for IP version 4 addresses, in which four decimal values are used, separated by
periods (dots).

11

Range of Class A address space

1.0.0.0 - 126.255.255.255

12

Range of Class B address space

128.0.0.0 - 191.255.255.255

13

Range of Class C address space

192.0.0.0 - 223.255.255.255

14

Range of Class D address space

224.0.0.0 - 239.255.255.255

15

Use for Class D address space

Multicasting

16

Range of Class E address space

240.0.0.0 - 255.255.255.255

17

Use for Class E address space

Multicasting

18

Network Address AKA

Network Number, Network ID

19

Term 'classful ip network' refers to

Any network of class a, b, or c

20

Goals of routing protocol

Learn & fill routing table with rout of each subet; select the best rout for a given destination; quickly remove /update routes when no longer valid; prevent routing loops

21

Routing Update

A generic reference to any routing protocol’s messages in which it sends routing information to a
neighbor.

22

RFC

Request for Comments. A document used as the primary means for communicating information
about the TCP/IP protocols

23

DNS

Domain Name System. An application layer protocol used throughout the Internet for translating
host names into their associated IP addresses

24

Host Name

The alphameric name of an IP host.

25

ARP

Address Resolution Protocol. The method by which any host or router on a LAN can learn the MAC address of another IP host or router on that same LAN.

26

ARP Request

"If this is your IP address, reply with your MAC address" -- Broadcast. Response is a unicast

27

Hosts remember ARP results in their _____

ARP Cache or ARP Table

28

Command to see the ARP cache

arp -a

29

PING

Packet Internet Groper

30

ICMP

Internet Control Message Protocol. A TCP/IP network layer protocol that reports errors and provides other information relevant to IP packet processing. (Like PING responses!)

31

Ping sends a _____ and receives a ____ in response

ICMP echo request to another IP address / ICMP echo reply from that address