Chapter 6 Network Fundaments Flashcards
Network
Ch.6- pg.264
- A network links two or more computers together to communicate and share resources
LANs (Local Area Networks)
Ch.6- pg.266
- The linking of computers to share resources in a closed environment
- Early LANs could only stretch across a single floor of the office and support only 30 people
- The software on early LANs could only used by one user at a time (file locking)
WANs (Wide Area Networks)
Ch.6- pg.266
- Could cover buildings, states, countries, and continents
- Use publically available communication lines
PANs (Personal Area Networks)
Ch.6- pg.266-268
- A group called Bluetooth Special Interest Group (SIG) created the Bluetooth
- PAN is a network that has been created for one person only
- WPAN (Wireless personal area network)
MANs (Metropolitan area network)
Ch.6- pg.268
- A type of network for a large campus or city
- Controlled by a central IT organization
Primary Network Components
Ch.6- pg.268
- Server
- Client or workstation
- Resource
Servers
Ch.6- pg.269
- Core component of a network
- Provides a link to the resources necessary to preform any task
- Preform several difficult critical roles on a network
Ex: File servers provide files to the server - Centralized control
Dedicated sever
Ch.6- pg.269
- A server that has one specific task
Ex: Web server- only task is to serve up web pages
Non-dedicated server
Ch.6- pg.270
- Provide one or more services and local access
Workstations
Ch.6- pg.270
- Where Network users do their work
- Also known as client computers
- Need lots of things to make a workstation a network client. You must install:
- NIC, a special expansion card, connect it with the cabling system, and a special software called client software
Network Resources
Ch.6- pg.271-272
- Printers and other peripherals
- Disk storage and file access
- Applications
Network Operating System (NOSs)
Ch.6- pg.272
- Runs on the server
- Types include UNIX, Linux, Mircosoft’s Windows Server series
Peer-to-Peer Networks
Ch.6- pg.273-274
- Also known as workgroups
- The computers act as both service provider and service requestors
- Small, inexpensive, great for small companies, and need little extra hardware
- No central administration or control, not very secure, and not for large companies
Client -Server Resource Model
Ch.6- pg.274-275
- Better for large companies
- More secure, centralized control, easier to share resources, and easier to preform backups
- Need more hardware, requires NOS
- Only choice for large networks
- Server-based networks known as domains
Network Topologies
Ch.6- pg.275
- Is a way of laying out a network
- Types include: Bus, star, ring, mesh, and hybrid
Bus Topology
Ch.6- pg.276
- Simplest, single cable runs to every workstation
- Each computer shares the same data and address path
- Easy to install
- Difficult to add another workstation, if one cable breaks, the entire network is disrupted
- Expensive to maintain
Star Topology
Ch.6- pg.276
- Branches each network device off a central device called a hub
- Easy to add workstations, easy to install
- If one workstation goes down it does not affect the network
- If one central device goes down the whole network goes down with it
- Expensive
- Most common topology used today
Ring Topology
Ch.6- pg.277
- Each computer connects to two other computers, joining them into a circle
- Each entity participating reads the message then regenerates it and hands it to its neighbor
- Difficult to add new computers
- One computer goes down, the whole network goes down
- Token Ring
Mesh Topology
Ch.6- pg.278
- Each device is connected to every other device
- to find out how many cables you do (x*(x-1))/2= how many cables (x # of computers)
- Difficult to add another workstation
- Complicated and expensive to install and maintain
Hybrid Topology
Ch.6- pg.279
- A mix of all the other topologies
- Most expensive
OSI Model
Ch.6- pg.280-281
- Open Systems Interconnection
- 7 Layers called:
- Application Layer
- Presentation layer
- Session Layer
- Transport Layer
- Network Layer
- Data Link Layer
- Physical Layer
IEEE 802
Ch.6- pg.281-283
- Rules that govern who talks when and how
- Ethernet (802.3 CSMA/CD
- CSMA/CD- Carrier Sense Multiple access/Collision Detection
Common Network Hardware
Ch.6- pg.283-297
- NIC Cards
- Cable
- Connectors
- Cabling Tools
Cable
Ch.6- pg.286-294
- Coaxial- contains a center conductor core, surrounded by a plastic jacket
- Twisted Pair- several wires twisted together in an insulated jacket
- Fiber Optic- Thin Flexible glass or plastic fiber surrounded by a rubber outer coating
Connectors
Ch.6- pg.286-297
- Coax Connectors- Thicknet and Vampire Taps, Thinnet and BNC
- Twisted Pair Connectors- RJ-11 and RJ-45
- Fiber Optic- ST (Straight Tip), SC (Subscriber Connector), LC (Local Connector)
Cabling Tools
Ch.6- pg.294-297
- Crimper- Strips, snips, and crimps the cable to the connector
- Multimeter- Measures voltage, current, and resistance on a wire
- Toner Probe- Tracks wires
- Cable Tester- Test cable
- Loopback Plug- Tests network adapter
- Punch-down Tool- Connects wires
Network Components
Ch.6- pg.297-300
- Connectivity Tools
- Auxiliary Tools
Connectivity Tools
Ch.6- pg.298-300
- Modems
- Access Points
- Hubs
- Bridges
- Switches
- Routers
Auxiliary Tools
Ch.6- pg.300-301
- NAS (Network-Attached Storage)
- Firewall
- VoIP Phones ( Voice over Internet Protocol
- Internet Appliance
