Net Plus

Top level domain

.com

Well known ports

0 to 1023

Class A network

1 to 126: 16m hosts, 126 networks

Class B network

128 to 191: 65k hosts, 16k networks

Class C network

192 to 223: 254 hosts, 2m networks

IP

Allows TCP/IP to internetwork, and responsible for logical addressing

Checksum

Allows the receiving node to determine if the TCP segment has been corrupted during transmission.

APIPA

Automatic Private IP Addressing. Provides link to local addressing on Windows clients

Aka structured wiring

Commercial building wiring standard

Telecommunications closet

Connectivity for a group of workstations

802.2

Error and flow control

802.3

Ethernet (using CSMA/CD access method)

ISO (equal)

Goal is to establish international technological standards to facilitate global exchange of information and barrier free trade.

802.1X

IEEE standard to port security

ICMP

Internet Control. Network layer. Detects errors but does not correct.

regenerator

Layer 1 of OSI

Network layer

Layer where IP operates

Transport layer

Layer where TCP operates

127

Loopback address

ARP

Maps MAC addresses to IPs. Network layer.

Cat 5

Minimum for modern LANs.

Star Topology

Most common topology

Telnet

Terminal emulation protocol

802.5

Token Ring

BOOTP and DHCP

Two ways of assigning IPs

RJ-45, DB-9, DB-25

Type of connectors used by RS-232

ITU

UN Agency to help developing countries

Bridge

Uses forwarding table

Cross connect facilities

Where circuits interconnect

802.11

Wireless

roll-up

a group of like patches put together to make sure the patch counters only go up by one

purpose is to secure back doors

a security enhancement

hot fix

a security fix to a specific customer or client, not available for download on a public site

channel bonding

allows 802.11g to have higher throughput

VPN concentrator

controls remote access

port mirroring

copies all traffic on one port to another port

IDS

detects malicious activity, does not prevent

feature packs

enhancements

trap

from device back to server

poll

from server to device

encapsulation

layer 2 of OSI model

segmentation

layer 4 of OSI

compression

layer 6 of OSI

IS-IS

link-state

OSPF

link-state

NOS (network operating system)

most difficult thing to upgrade on a network

NIPS

network intrusion prevention system

service packs

put thousands of patches in one pack

Rollback

removing a patch

FCS

trailer used in framing

RG-59

used for cable tv, short range

TLS (Transport layer security)

version of SSL.