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TC 361 Data Networking Test Review

TC 361 Data Networking Test Review. Network Cabling. UTP Generally used in Ethernet installations Cat 3 10 Mbps Cat 5 100 Mbps Cat 5e 1000 Mbps 100M length. Network Cabling. Coax Has a core made of copper. ThinNet BNC connector 183M ThickNet Vampire Taps (MAU) 500M.

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TC 361 Data Networking Test Review

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  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. 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 Network Types

  8. 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. Network Types Cont.

  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. 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 Network Hardware

  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. 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 Network Hardware Cont.

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

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

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

  17. 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.

  18. Network Health • Common Sense • Computer don’t like water and heat • Data Redundancy • Tape Backup • RAID • Mirroring- copying one partition to another disk.

  19. 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

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

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