network +

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Author:
kblaze152
ID:
305785
Filename:
network +
Updated:
2015-07-27 20:55:12
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net
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network + study guide
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  1. 1) what does vpn stand for

    2)what does a vpn do & what are some examples of vpn protocol
    1) virtual private network

    2) A vpn provides security  examples-PPTP & L2TP
  2. VLAN is ?
    vlan is software based
  3. what does WAN stand for?

    What is a WAN?
    Wireless Area Network

    A bunch of LAN's put together, must have a router or layer 3 switch to communicate
  4. LAN's are connected via a?

    Example of Servers?
    Router

    web, mail, fax, file
  5. What does MPLS stand for?

    What are the advantages of MPLS?
    Multiprotocol label switching

    physical layout and flexibility
  6. what is P2P?
    what is an example of P2P
    Advantages?
    Peer to Peer networks

    torrents

    No central administration
  7. what do client/server networks do?
    central server provide, advertise and manage access to network resources
  8. Bus topolgy?

    advantages and disadvantages?
    all computers are connected to a single cable

    • Initially less expensive; if there is a problem with a cable or node, the entire network goes down.
    • No fault tolerance
  9. Explain a Star?

    Advantages and disadvantages?
    Each computer is connected to a central point 

    • Easy to set up, expand, and detect faults
    • Any failure will have very little effect on the network;
    • expensive to install, extra hardware required
  10. Ring?

    Advantages and disadvantages?
    • A method of transmitting data around a ring is called token passing.
    • Uses tokens, no collisions

    Prevents network collision; data packets must pass through every computer between the sender and recipient, therefore it is slower
  11. Mesh?
    • uses point to point
    • failure of a single node doesnt affect network
    • provides high level of redundancy
    • uses mpls
    • can handle heavy traffic
  12. Point to Point?
    connection between two routers, giving you communication path

    most popular with wireless
  13. Point to Multipoint?
    One point to multiple connections
  14. hybrid?
    a combination of two or more types of physical or logical network topologies working together within the same network

    ex: physical star, logical bus
  15. What is a backbone?

    what is a segment?
    where everyone gets there connection from

    short section of the network that is not part of the backbone
  16. FTP?
    TelNet?
    SMTP?
    SNMP?
    DNS?
    NFS?
    • file transfer protocol
    • terminal network emulation
    • simple mail transfer protocol
    • simple network management protocol
    • domain name service
    • Network File System
  17. upper layers?

    lower layers?
    mostly software

    mostly hardware
  18. TCP?
    UDP?
    transmission control protocol (reliable)

    user datagram protocol (unreliable)
  19. What does transport- layer 4 do?
    Windowing- amount of data a sender is allowed to transmit without having received an acknowledgement

    flow control- allow receiver to control amount of data sent by sender
  20. Network-layer 3 uses what types address?

    popular network devices?
    logical address and IP address

    routers, layer 3 switches and hardware based firewalls
  21. IPSEC?

    IPSEC  common routing protocols used are?
    Internet protocol security 

    • RIP-routing information protocol
    • RIPv2-
    • EIGRP-enhanced interior gatewat routing protocol
    • OSPF-open shortest path first
    • ping, ICMP, IGMP, IP
  22. Data link - layer 2?

    Data link sublayers?
    transmits network layer messages into bits for the physical layer

    MAC-media access control-how packets are placed on the media

    LLC- logical link control- identifying network layer protocols(802.2 upper half of data link layer)
  23. popular devices that work at data link layer?
    • bridges
    • switches-break up collision domains
    • wireless access points
    • ethernet, PPP, PPFP, 802.3
  24. physical- layer 1?
    • provides an interface for the DTE(data terminal equipment)
    • The last communication for the carrier
    • DCE(data communication equipment) connected to the DTE
  25. physical topologies?

    popular devices?
    bus, star, ring, mesh, hybrid

    NIC(network interface cards), transceivers,transmitters, repeaters, hubs
  26. plenum wiring?
    a plenum is created by a false ceiling or false floor; contains high voltage wiring to prevent fires
  27. coaxial cable?
    does not suffer interference from EMI

    coaxial cable uses a BNC(british naval connector)and F-type
  28. current ethernet standards?

    what is a crimping tool?
    110 block- patch panel

    crimping tool is used to terminate cable
  29. RG-58 U
    none, SOLID COPPER
  30. RG-58 A/U
    Thinnet, 10Base2, stranded copper
  31. RG-8
    THicknet, 10Base5, solid copper
  32. RG-59
    cable tv, none, solid copper
  33. RG-6
    cable tv/modem, none or HPNA, solid copper
  34. RG-62
    ARCnet, n/a, solid/stranded
  35. UTP?

    STP?
    unshielded twisted pair

    shielded twisted pair-protection from interference and crosstalk
  36. RJ-11
    Registered Jack-11 used for phone lines
  37. RJ-45
    Registered jack -45 identifies,

    Ethernet 10Base-t, 100Base-tx, 1000Base-t
  38. fiber optic cable media?
    comes in glass or plastic

    • transmits digital signal using light
    • immune to EFI  & RFI
    • can transmit up to 40 kilometers(25miles)
  39. SMF?
    • Single mode fiber optic
    • data rates of up to 10Gb/sec are possible at distances of over 60 kilometers 
    • used for longer cable runs
    • yellow in color
  40. MMF?
    • Multimode fiber optic
    • shorter ranges
    • light is dispersed over numerous paths
    • orange in color
  41. MMF
    • 100 mb up to 2 km (100Base-fx)
    • 1GB for distances up to 500-600 meters(1000Base-lx, 1000Base-sx)
    • 10Gb for distances up to 300 meters(10GBase-SR)
  42. ST?
    SC?
    SFF?
    LC?
    • ST-straight tip
    • SC-subscriber connector or standard connector
    • SFF-small form factor
    • LC-local connector
  43. media converter?
    allows a NIC or other networking device to connect to a different type of media

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