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35 Cards in this Set

  • Front
  • Back
Under what circumstance might you use a simple bus topology?
a. when you your LAN services many users
b. when your LAN services multiple locations
c... when your LAN services few users
d. when you want to ensure the highest level of security
e. when you use hubs to separate workstation groups
What kind of topology is susceptible to signal bounce?
a. mesh
b... bus
c. ring
d. hierarchical
What are the primary advantages of using a star topology over a ring or bus
topology?
more reliable, more scaleable.
Most modern networks with more than a few nodes use a hybrid topology. True
or False?
True.
Why might you want to use a hierarchical topology?
a... to differentiate levels of connectivity devices and workstation groups
b. to enable multiprotocol routing between LAN segments
c. to account for signal bounce between two LAN segments
d. to use multiple frame types on an Ethernet network
e. to ensure greater reliability for critical network connections
What logical topology, or network transport model, relies most often on a star-wired
bus topology?
a... Ethernet
b. FDDI
c. ATM
d. Token Ring
e. LocalTalk
How do workstations in a ring topology negotiate their data transmissions?
a. by using CSMA/CD
b. by using RARP
c. by using demand priority
d... by using tokens
e. by using CSMA/CA
Which of the following is a potential problem with daisy-chaining hubs?
a... exceeding the maximum network length
b. exceeding the maximum number of workstations per hub
c. exceeding the maximum collision rate
d. exceeding the maximum transmission rate
e. exceeding the maximum number of workstations per segment
What type of network backbone is the most reliable?
a. distributed
b. collapsed
c... parallel
d. serial
e. hierarchical
The Internet is an example of what kind of WAN topology?
a. peer-to-peer
b. bus
c... mesh
d. ring
e. tiered
Why is packet switching more efficient than circuit switching?
a. In packet switching, two communicating nodes establish a channel first, then
begin transmitting, thus ensuring a reliable connection and eliminating the
need to retransmit.
b... In packet switching, packets can take the quickest route between nodes and
arrive independently of when other packets in their data stream arrive.
c. In packet switching, data are sent to an intermediate node and reassembled
before being transmitted, en masse, to the destination node.
d. In packet switching, packets are synchronized according to a timing mechanism
in the switch.
Describe the steps a workstation takes under the rules of CSMA/CD.
Each node waits its turn before transmitting data, to avoid interfering with other nodes transmissions.
On a 100BaseT (Fast Ethernet) network, what is the maximum number of hubs
that can be connected along the bus of a star-wired bus topology?
a... 2
b. 3
c. 4
d. 5
e. 6
What is the maximum number of addressable stations on a 10BaseT Ethernet
network?
a. 64
b. 100
c. 200
d. 512
e... 1024
Which two of the following might cause excessive data collisions on an Ethernet
network?
a. The network is attempting to use two incompatible frame types.
b... The overall network length exceeds IEEE 802.3 standards for that network type.
c. A router on the network is mistakenly forwarding packets to the wrong segment.
d. A switch on the network has established multiple virtual circuits for a path
between two nodes.
e... A server on the network contains a faulty NIC.
What type of media is best suited to 1 Gigabit Ethernet networks?
a... fiber-optic
b. unshielded twisted-pair
c. thick coaxial
d. shielded twisted-pair
e. infrared
In order to use demand priority on a network (for example, when running
100BaseVG), what type of hub is necessary?
a. modular
b. repeater
c. stackable
d... intelligent
e. managed
What fields do all Ethernet frame types have in common?
CSMA/CD
At what layer of the OSI Model does framing occur?
a. Physical layer
b... Data Link layer
c. Network layer
d. Transport layer
e. Session layer
What is the purpose of padding in an Ethernet frame?
a. ensuring that the frame and data arrive without error
b. ensuring that the frame arrives in sequence
c. indicating the length of the frame
d. indicating the type of higher-layer protocol supported by the frame
e... ensuring that the data portion of the frame totals at least 46 bytes
What is the purpose of a Frame Check Sequence field in an Ethernet frame?
a... ensuring that data are received without errors at the destination node
b. ensuring that the frame’s length stays constant through transmission
c. ensuring that the frame is synchronized with other frames in its data stream
d. ensuring that the frame arrives at the proper destination address
e. indicating the frame’s source address
NIC device drivers come with what feature that reduces the need for you to
worry about frame types?
a. autodetect
b. autonegotiate
c... autosense
d. autorespond
e. autotranslate
What are the minimum and maximum sizes for an Ethernet frame?
a. 46 and 64 bytes
b. 46 and 128 bytes
c... 64 and 1518 bytes
d. 64 and 1600 bytes
e. 128 and 1600 bytes
What type of TCP/IP protocol does LocalTalk use?
a. MS TCP/IP
b... MacTCP
c. AppleTalk
d. EtherTCP
e. Apple TCP/IP
What is the name of a hub used on a Token Ring network?
a... Multistation Access Unit
b. Multiple Carrier Control Unit
c. Multinode Access Station
d. Media Access Control Unit
e. Media Access Unit
Which two of the following are disadvantages to using Token Ring networks rather than Ethernet networks?
a. Their standards are not as well defined as Ethernet’s.
b... They are slower than Ethernet.
c... They require more expensive connectivity equipment than Ethernet
d. They are less reliable than Ethernet.
e. They can’t extend as far as Ethernet.
Modern Token Ring networks may transmit data at either 4, 16, 32, or 64 Mbps.
True or False?
False
If you were working on a Token Ring network that used cables with DB-9 con-nectors and needed to connect a NIC that contained an RJ-45 receptor, which of the following would help you accomplish your goal?
a. media access unit
b. crossover cable
c. vampire tap
d... media filter
e. type 1 IBM connector
Which of the following IEEE standards describes Token Ring networks?
a. IEEE 802.2
b. IEEE 802.3
c. IEEE 802.4
d... IEEE 802.5
e. IEEE 802.11
Which of the following logical topologies is capable of the fastest throughput?
a. LocalTalk
b. Fast Ethernet
c. FDDI
d. Token Ring
e... ATM
What type of Physical layer is required for FDDI?
a. a single ring of single mode fiber
b. a dual ring of single mode or multimode fiber
c. a dual ring of unshielded twisted-pair cabling
d. a single ring of shielded twisted-pair cabling
e... a single ring of multimode fiber
Besides their ring-based topologies, what else do FDDI and Token Ring networks have in common?
a. Both require fiber at the Physical layer.
b. Both require twisted-pair cabling at the Physical layer.
c... Both use token passing to mediate data transmission.
d. Both are less expensive and easier to implement than Ethernet.
e. Both rely on the parallel backbone structure.
You have been asked to serve on a technical committee planning an upgrade from your university’s FDDI network to a Gigabit Ethernet network.The rest of the committee asserts this will be a relatively simple transition.What concern should you raise that contradicts their assertion?
a. All of the FDDI fiber will have to be dug up and replaced with single
mode fiber.
b... The maximum allowable distance for a FDDI network is longer than that of an
Ethernet network, so the existing FDDI network will need to be divided into
smaller subnetworks.
c. The connectors on the ends of the FDDI cables are SMA connectors, which
will not fit into the receptors on Gigabit Ethernet routers.
d. Since the transmission rate on the Ethernet network will be less than that of the FDDI network, users will notice dramatically slower response times.
What type of switching do ATM networks use?
a... circuit switching
b. packet switching
c. multiprotocol switching
d. message switching
e. Layer 1 switching
Which two of the following might explain why network administrators prefer Gigabit Ethernet over ATM?
a... Gigabit Ethernet is a more natural upgrade for their existing Ethernet networks.
b. Gigabit Ethernet is typically less expensive to implement than ATM.
c. Gigabit Ethernet can carry TCP/IP traffic, while ATM cannot.
d... Gigabit Ethernet is endorsed by Microsoft and Novell, while ATM is not.
e. Gigabit Ethernet offers quality of service guarantees, while ATM does not.