Free 100-101 Exam Braindumps

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  • Exam Code: 100-101
    Exam Title:
  • Provider: Cisco®
  • Questions: 202
  • Updated On: 20-Nov-2018


Topic 1, Operation of IP Data Networks

QUESTION: 1

Which three statements are true about the operation of a full-duplex Ethernet network? (Choose
three.)

A. There are no collisions in full-duplex mode.
B. A dedicated switch port is required for each full-duplex node.
C. Ethernet hub ports are preconfigured for full-duplex mode.
D. In a full-duplex environment, the host network card must check for the availability of the
network media before transmitting.
E. The host network card and the switch port must be capable of operating in full-duplex mode.
Answer(s): A,B,E
Explanation:
Half-duplex Ethernet is defined in the original 802.3 Ethernet and Cisco says you only use one
wire pair with a digital signal running in both directions on the wire. It also uses the CSMA/CD
protocol to help prevent collisions and to permit retransmitting if a collision does occur. If a hub
is attached to a switch, it must operate in half-duplex mode because the end stations must be
able to detect collisions. Half-duplex Ethernet--typically 10BaseT--is only about 30 to 40 percent
efficient as Cisco sees it, because a large 10BaseT network wil usually only give you 3- to
4Mbps--at most.
Ful -duplex Ethernet uses two pairs of wires, instead of one wire pair like half duplex. Also, full
duplex uses a point-to-point connection between the transmitter of the transmitting device and
the receiver of the receiving device, which means that with full-duplex data transfer, you get a
faster data transfer compared to half duplex. And because the transmitted data is sent on a
different set of wires than the received data, no collisions occur. The reason you don't need to
worry about collisions is because now Ful -duplex Ethernet is like a freeway with multiple lanes
instead of the single-lane road provided by half duplex. Ful -duplex Ethernet is supposed to offer
100 percent efficiency in both directions; this means you can get 20Mbps with a 10Mbps
Ethernet running full duplex, or 200Mbps for FastEthernet.

QUESTION: 2

DRAG DROP

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