IC3: 2nd Quarter - MT #1

Local Area Network (LAN)

---

• smallest network

• operated within a limited physical area

• a network consisting of less than 500 interconnected devices

Metropolitan Area Network (MAN)

• high speed network that connects local networks in a metropolitan area

• handles bulk of communication activity

Wide Area Network (WAN)

• covers a large geographical area

• connects multiple Local Area Networks (LAN)

• combines many types of media such as telephone lines, cable, and radio waves

• internet - largest wide area network

Client Server Network

• where different computers or clients are connected to a main computer or server

Peer-to-Peer Network

• different computers with equal capacities connected to use resources available on the network

• designed primarily for small local area networks

Bus Topology

• each node shares the network’s total capacities

• adding more computers will reduce network speed

Ring Topology

• each node is connected to form a circle

• data travels only in one direction

• if a node fails, the whole network fails

Star Topology

• each node is connected through a central device

• centralized control

Mesh Topology

• nodes are interconnected with one another

• facilitates direct communication

• if a node fails, there are alternatives in the network

First Generation

• reliant upon analog radio systems

• could only make phone calls

• introduced in 1979 in Japan

• unreliable due to security issues

Second Generation

• ran on digital signals

• could send SMS and MMS (but often without success)

• uses GPRS technology

• introduced in 1991

• improved capacity and security

Third Generation

• can video call, share files, surf internet, etc.

• much faster and greater data transmission

Fourth Generation

• five times faster than 3G

• can provide up to 100Mbps

• all mobile models released 2013 should support

• higher specs

Short Message Service (SMS)

A text message of up to 160 characters without an attached file

Multimedia Messaging Service (MMS)

Text that includes a file—like a picture, video, emoji, or a website link

General Packet Radio Service (GPRS)

• a packet-switching technology that allows information to be transmitted via mobile networks.

• used in 2G and 3G

• introduced in 1997

File Management

Methods for naming, storing, and handling files

Drive Letters

A single alphabetic letter A through Z is assigned to a physical computer drive

Folders

A container for files

Subfolders

A folder contained within another folder

Directory

Organization of files and folders on a disk

Root directory

Highest level of any directory on a disk always represented by a drive letter

Path

Indicated the exact route to follow to get the location of a file

Ctrl + C

Copy a file

Ctrl + F

Search for files

Ctrl + X

Cut/move file

Ctrl + V

Paste

Ctrl + S

Save

Ctrl + Shift + S

Save as

Ctrl + W

Close a window

F2

Rename a file

Ctrl + Shift + T

Reopen a closed tab

Ctrl + Shift + N

Create new folder