Network Basics Flashcards
It can be any device that connects to the network
Client
Provides resources to the rest of the network
Server
Older technology to connect networked devices, such as clients and
servers
Can be interconnected to provide more ports, but leads to increased network errors
Receives information in one port and rebroadcasts it out all the other ports
Hub
▪ Device that allows wireless devices to connect to a wired network
▪ Commonly used in homes, small businesses, and even some large enterprise networks
▪ Acts as a wireless hub
Wireless Access Point (WAP)
Connects networked devices such as clients and servers (like a hub)
Can learn what devices are on which ports
Can only forward traffic received from a port to the destination port based on the device’s MAC address
Provides more security and efficiently uses available bandwidth
Switch
Connect two different networks together
Intelligently forward traffic to and from a network based on its logical address
Router
Connect two devices or a device to a port
Made from copper cable, fiber optic cable, or radio frequency waves (WiFi)
Each type has strengths and limitations, such as its available bandwidth, capacity, distance that can be covered, and cost to install and maintain
Media
Physically connects networks together
Numerous WAN links are available: leased lines, DSL, cable, fiber optic, satellite, cellular, microwave, etc.
Connects internal network to external networks, such as a SOHO network to Internet
Wide Area Network (WAN) Link
▪ Uses dedicated server to provide access to files, scanners, printers, and other resources
▪ Administration and backup are easier since resources are located on a few key servers
Client/Server Model
Benefits of Client/Server
Centralized administration
Easier management
Better scalability
Drawback of Client/Server
Higher cost
Requires dedicated resources
Requires network operating system
▪ PCs share resources (files/printers)
with each other directly
▪ Administration and backup are more difficult
since resources are located on a many PCs
which adds to the administrative burden
Peer-to-Peer Model
Benefits of Peer-to-Peer
Lower cost
No dedicated resources required
No specialized operating system required
Drawbacks of Peer-to-Peer
Decentralized management
Inefficient for large network
Poor scalability
Smallest type of wired or wireless network
Covers the least amount of area (few meters)
Personal Area Network (PAN)
Examples of a Personal Area Network (PAN)
Bluetooth cellphone to car
USB hard drive to laptop
Firewire video camera to computer
Connects components in a limited distance
Each segment is limited to short distances, such as 100 meters with CAT 5 cabling
Consists of Ethernet (IEEE 802.3) or WiFi networks (IEEE 802.11)
Local Area Network (LAN)
Standard for Ethernet
IEEE 802.3
Standard for WiFi networks
IEEE 802.11
Connects building-centric LANs across a university, industrial park, or business park
Covers many square miles and buildings
Campus Area Network (CAM)
Examples of a Campus Area Network (CAM)
College Campus
Business Park
Military bases
Connects scattered locations across a city
Larger than a CAN, but smaller than a WAN
Covers up to a 25-mile radius in larger cities
Metropolitan Area Network (MAN)
Examples of a Metropolitan Area Network (MAN)
City departments like the police department
Community college with campuses spread across a county
Connects geographically disparate internal networks
Consists of leased lines or Virtual Private Networks tunneled over the Internet
Covers distances around the country or around the world
Wide Area Network (WAN)
