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Details

Advanced Network Management
Advanced Network Management
21
Computer Networking
Undergraduate 3
05/08/2012

Additional Computer Networking Flashcards

 


 

Cards

Term

DHCP

 

 

 

 

Operation Code

Definition

 

 

 

Tells what type of DHCP packet

it is. It is either a "request" or

it is a "reply".

Term

DHCP

 

 

 

Hardware Type

Definition

 

 

 

 

The type of hardware used for the

local network. It is usually Ethernet.

Term

DHCP

 

 

 

 

Hardware Length

Definition

 

 

 

 

Because hardware type is usually

Ethernet, the length is 48 bits (6 bytes)

because it is using a MAC address

Term

DHCP

 

 

 

 

Hop Count

Definition

 

 

 

 

A count of how many relay agents

the DHCP packet is going across.

Term

DHCP

 

 

 

 

Transaction ID

Definition

 

 

 

 

Used to identify a DHCP "conversation"

from other DHCP "conversations".

Term

DHCP

 

 

 

 

Number of Seconds

Definition

 

 

 

 

Transaction length. Also known

as how long a DHCP "conversation"

lasts.

Term

DHCP

 

 

 

 

"F" field

Definition

 

 

 

 

DHCP is non-routable. "F" is a flag and its

best default is to set it to broadcast.

Term

DHCP

 

 

 

 

Client IP Address

Definition

 

 

 

 

What IP address the client has

requested/agreed upon.

Term

DHCP

 

 

 

 

Your IP Address

Definition

 

 

 

 

 

The IP address being sent by the server.

Term

DHCP

 

 

 

 

Server IP Address

Definition

 

 

 

 

 

The IP address of the DHCP server.

Term

DHCP

 

 

 

 

Gateway IP Address

Definition

 

 

 

 

Router IP address.

(in case of any relays)

Term

DHCP

 

 

 

 

Client Hardware Address

Definition

 

 

 

 

Contains the actual hardware

address (usually MAC).

Term

DHCP

 

 

 

 

Boot File Name

Definition

 

 

 

 

 

For use with services like Boot P.

Term

DHCP

 

 

 

 

Magic Cookie

Definition

 

 

 

 

If present in a DHCP packet, options

are following. If not present, the entire

options field is cut off.

Term

DHCP

 

 

 

 

Explain the connection diagram.

Definition


server is passively open.

client --dhcpdiscover-> server

client <-dhcpoffer-- server

client --dhcprequest-> server

client <-dhcpack-- server

(before 50% of lease time expires)

client --dhcprequest-> server

(if the server does not respond the request is repeated)

client --dhcprequest-> server

(if the server responds with a nack, the client must start all over again)

client <-dhcpnack-- server

(if the server responds with an ack, the client has a new lease)

client <- dhcpack-- server

client --dhcprelease->

Term

DHCP

 

 

 

 

resolv.conf

Definition

 

 

 

 

 

Used to set the DNS domain addresses.

Term

DNS

 

 

 

 

PQDN

Definition

 

 

 

 

 

Partially Qualified Domain Name

Term

DNS

 

 

 

 

FQDN

Definition

 

 

 

 

Fully Qualified Domain Name

(the "." at the end of a domain name)

Term

DNS

 

 

 

 

named.conf.local

Definition

 

 

 

A file used to organize and reference

all the zone files being used by the DNS

server.

Term

DNS

 

 

 

 

Zone File

Definition

 

 

Used to retain information about

a specific domain. Contains origin, ttl,

a unique serial number, slave update

time, retry time on failed slave update,

slave expiration time, and maximum

cache time. Uses FQDN's.

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