3c251 Volume 3

76 Questions | Total Attempts: 318

SettingsSettingsSettings
Please wait...
3c251 Volume 3

3C251 Volume 3. URE's only.


Questions and Answers
  • 1. 
    What device is a combination transmitter/receiver in a single package?
    • A. 

      A transceiver

    • B. 

      A repeater

    • C. 

      A router

    • D. 

      A hub

  • 2. 
    What device operates at the Physical layer of the open system interconnection (OSI) model and is used in Ethernet networks to connect which device to a fiber or copper cable?
    • A. 

      Transceiver

    • B. 

      Gateway

    • C. 

      Router

    • D. 

      Switch

  • 3. 
    What device provides physical, electrical, and electronic connections to the network media?
    • A. 

      Bridge

    • B. 

      Router

    • C. 

      Gateway

    • D. 

      Network interface card (NIC)

  • 4. 
    What layers of the open system interconnection (OSI) model do network interface cards (NIC) belong?
    • A. 

      Data Link and Network layer

    • B. 

      Physical layer and Network layer

    • C. 

      Physical layer and Data Link layer

    • D. 

      Physical, Data Link, and Network layer

  • 5. 
    The device that receives a digital signal and regenerates the signal along the next leg of the medium is a
    • A. 

      Bridge

    • B. 

      Router

    • C. 

      Gateway

    • D. 

      Repeater

  • 6. 
    A repeater with more than one output port is a
    • A. 

      Hub

    • B. 

      Bridge

    • C. 

      Router

    • D. 

      Gateway

  • 7. 
    What can be used to extend the size of a network?
    • A. 

      Router

    • B. 

      Gateway

    • C. 

      Active hubs

    • D. 

      Passive hubs

  • 8. 
    What is a device that subdivides a network into smaller logical pieces, or segments?
    • A. 

      Switch

    • B. 

      Router

    • C. 

      Gateway

    • D. 

      Repeater

  • 9. 
    What is the time a switch takes to figure out where to forward a data unit is called?
    • A. 

      Lag

    • B. 

      Hop

    • C. 

      Latency

    • D. 

      Time zone

  • 10. 
    What network device is a combination of networking hardware and software that connect two dissimilar kinds of networks?
    • A. 

      Switch

    • B. 

      Router

    • C. 

      Gateway

    • D. 

      Repeater

  • 11. 
    What type of gateway can restrict the kind of access local area network (LAN) users have to the internet, and vice verse?
    • A. 

      A voice/data gateway

    • B. 

      An internet gateway

    • C. 

      A LAN gateway

    • D. 

      A firewall

  • 12. 
    What type of gateway might include remote access servers that allow dial-up connectivity to a local area network (LAN)?
    • A. 

      A voice/data gateway

    • B. 

      An internet gateway

    • C. 

      A LAN gateway

    • D. 

      A firewall

  • 13. 
    What is a router's strength?
    • A. 

      Its intelligence

    • B. 

      Its quality of service

    • C. 

      Its different interface cards

    • D. 

      Its different types of network connections

  • 14. 
    What is the oldest routing protocol?
    • A. 

      Border Gateway Protocol (BGP)

    • B. 

      Open Shortest Path First (OSPF)

    • C. 

      Routing Information Protocol (RIP)

    • D. 

      Enhanced Information Gateway Routing Protocol (EIGRP)

  • 15. 
    What is the routing protocol of internet backbones?
    • A. 

      Border Gateway Protocol (BGP)

    • B. 

      Open Shortest Path First (OSPF)

    • C. 

      Routing Information Protocol (RIP)

    • D. 

      Enhanced Information Gateway Routing Protocol (EIGRP)

  • 16. 
    Based on a specific input address, which level local area network (LAN) switch has the lowest delay and should be considered for supporting real-time application?
    • A. 

      Hybrid switch

    • B. 

      Cut-through switch

    • C. 

      Fragment-free switch

    • D. 

      Store and forward switch

  • 17. 
    What synchronous optical network (SONET) device aggregates or splits SONET traffic at various speeds so as to provide access to SONET without demultiplexing the SONET signal stream?
    • A. 

      Add/drop multiplexer (ADM)

    • B. 

      Drop-and-repeat node (D+R)

    • C. 

      Digital cross connect (DCS)

    • D. 

      Digital line carrier (DLC)

  • 18. 
    What synchronous optical network (SONET) devices configured to split SONET traffic and copy individual channels on two or more output links?
    • A. 

      Add/drop multiplexer (ADM)

    • B. 

      Drop-and-repeat node (D+R)

    • C. 

      Terminal multiplexer (TM)

    • D. 

      Digital line carrier (DLC)

  • 19. 
    When tributary units are grouped together they form
    • A. 

      A tributary unit group (TUG)

    • B. 

      A virtual container

    • C. 

      Synchronous transport signal level N (STS-N) frames

    • D. 

      Synchronous transport modules (STM) frames

  • 20. 
    An OC-12's electrical signal is the same as a synchronous transport signal level-12 (STS-12) frame and equal to what synchronous transport modules (STM) frame?
    • A. 

      STM-2

    • B. 

      STM-4

    • C. 

      STM-6

    • D. 

      STM-8

  • 21. 
    Because of its cost, Asynchronous Transfer Module (ATM) is rarely used on small local area networks (LAN).  What technology is better suited for LANs?
    • A. 

      Gigabit Ethernet

    • B. 

      Fast Ethernet

    • C. 

      Ethernet

    • D. 

      Synchronous optical network (SONET)

  • 22. 
    What topology defines the layout of a network's devices and media?
    • A. 

      Physical

    • B. 

      Logical

    • C. 

      Star

    • D. 

      Hybrid

  • 23. 
    What topology consists of devices connected to a common, shared cable?
    • A. 

      Bus

    • B. 

      Ring

    • C. 

      Star

    • D. 

      Hybrid

  • 24. 
    What topology consist of cable segments from each computer connected to a centralized component?
    • A. 

      Bus

    • B. 

      Ring

    • C. 

      Star

    • D. 

      Hybrid

  • 25. 
    What topology has the stations connected in the form of a circle?
    • A. 

      Bus

    • B. 

      Ring

    • C. 

      Star

    • D. 

      Hybrid