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TC 361 Data Networking Test Review

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Contains Header and Trailer, CRC, and data. Data is divided into packets for ease of transmission ... Packet ACK, Error Detection, Flow Control ... – PowerPoint PPT presentation

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Title: TC 361 Data Networking Test Review


1
TC 361 Data NetworkingTest Review
2
Network Cabling
  • UTP
  • Generally used in Ethernet installations
  • Cat 3 10 Mbps
  • Cat 5 100 Mbps
  • Cat 5e 1000 Mbps
  • 100M length

3
Network Cabling
  • Coax
  • Has a core made of copper.
  • ThinNet
  • BNC connector
  • 183M
  • ThickNet
  • Vampire Taps (MAU)
  • 500M

4
Network Cabling Cont.
  • Fiber Optic
  • Single Mode
  • Laser
  • Multi Mode
  • LED
  • Multiple Signals
  • 2KM Length
  • ST, SC connector
  • Not susceptible to EM interference

5
Network Communication
  • Packet
  • Variable Length
  • Contains Header and Trailer, CRC, and data
  • Data is divided into packets for ease of
    transmission
  • Cell
  • Fixed Length
  • MAC address

6
OSI
7
Network Types
  • Ethernet
  • Carrier Sense Multiple Access/Collision Detection
    (CSMA/CD)
  • Contention network
  • Simultaneous transmissions cause collisions
  • 10-1000 Mbps
  • 802.3
  • Physcial Media
  • Coaxial (ThickNet, ThinNet), UTP, STP, Fiber
  • Token Ring
  • 802.5
  • 4-100 Mbps
  • Physical Media
  • Proprietary IBM standard

8
Network Types Cont.
  • FDDI
  • Fiber Distributed Data Interface
  • Token Passing
  • Can work in two counter-rotating rings.
  • Can be used as a backbone network
  • ATM
  • Asych Transfer Mode
  • Data is broken into fixed cells
  • Ideal for voice/video/data
  • Transmits 53 byte cells.

9
Network Types Cont.
  • Wireless
  • 802.11b
  • 11 Mbps
  • 2.4 GHZ
  • 802.11a
  • 54 Mbps
  • 5GHz
  • 802.11g
  • 54 Mbps
  • 2.4 GHz
  • Compatible with 802.11b

10
Network Topologies
  • Star
  • Used in Ethernet.
  • Computers connected to a central unit.
  • Bus
  • Computers are connected in a series
  • A break in the cable will cause the entire
    segment to collapse.
  • Must use terminators
  • Ring
  • Passes a token (packet) from one segment to
    another
  • Can have the physical topology of a star network.
  • Mesh
  • Every computer is connected to one another
  • Most expensive and reliable technology

11
Network Hardware
  • Hub
  • Used to connect computers together
  • Repeats packets to all computers on the hub
  • Token Ring Multi Station Access Unit
  • Switch
  • Used to connect computers together
  • Repeats packet to the destination system only


12
Network Hardware
  • NIC
  • PCI or ISA
  • Communicates between physical media and computer
  • Driver
  • Works in the MAC sub-layer of the Data Link layer

64-Bit PCI
32-Bit PCI
13
(No Transcript)
14
Network Hardware Cont.
  • Bridge
  • Connects two network segments together
  • Operates at the Data Link layer
  • Filters data based on network segment
  • Broadcast messages are still sent to all
    connected nodes
  • Router
  • Connects two network segments together
  • Operates at the Network Layer
  • Provides best route for data
  • Can work with multiple network types
  • Two major types Static and Dynamic

15
Network Hardware Cont.
  • Gateway
  • Device that sits between LAN and WAN

16
Network Hardware Cont.
  • Wireless Access Point (WAP)
  • Central Point in a wireless network

17
NOS
  • Windows 2000
  • Active Directory
  • Domain Controller
  • NT 4.0
  • PDC/BDC
  • Unix and derivatives
  • NIS
  • SAMBA

18
Network Security
  • Outside Threats
  • DOS, DDOS
  • Virus
  • Intrusion
  • Internal Threats
  • Intentional, Unintentional
  • Encryption
  • Data
  • Communication
  • VPN
  • Uses Point to Point Tunneling Protocol
  • Shares
  • Can be setup as read, write, execute, and delete.

19
Network Health
  • Common Sense
  • Computer dont like water and heat
  • Data Redundancy
  • Tape Backup
  • RAID
  • Mirroring- copying one partition to another disk.

20
Network Protocols
  • TCP/IP
  • TCP (Transport Control Protocol)
  • Packet ACK, Error Detection, Flow Control
  • Adds sequencing numbers to packets so they can be
    reassembled
  • IP (Internet Protocol)
  • 32 bit number
  • Routable/Non Routable
  • 192.168.0.0-192.168.255.255
  • 172.16.0.0-172.32.255.255
  • 10.0.0.0-10.255.255.255
  • UDP (User Datagram Protocol)
  • Similar to TCP but no connection is maintained

21
Network Protocols Cont.
  • NetBEUI
  • Not a routable protocol
  • Used primarly in windows systems
  • IPX/SPX
  • Internetwork Exchange/Sequenced Packet Exchange
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