Self-Assessment Quizzes Chapter 5 MC,T&F

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1.
A channel partitioning protocol has which of the following characteristics:
there is no master node
all transmitting nodes get the same amount of bandwidth
it does not generate collisions
all of the above
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2.
In slotted ALOHA with N active nodes, the probability that no node transmits in a given slot is
(1-p)N
(1-p)^N
p^N
1-p
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3.
An ARP query packet is encapsulated in
an IP datagram
a link-layer frame addressed to a specific adapter
a link-layer broadcast frame
none of the above
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4.
Ethernet provides which of the following services to the network layer
error detection
flow control
reliable data transfer
all of the above
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5.
For Ethernet, if an adapter determines that a frame it has just received is addressed to a different adapter
it discards the frame and sends an error message to the network layer
it discards the frame without sending an error message to the network layer
it delivers the frame to the network layer, and lets the network layer decide what to do
it sends a NACK (not acknowledged frame) to the sending host
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6.
In the Ethernet CSMA/CD protocol, suppose a node constructs a frame and then senses the channel as busy. Then
the adapter enters exponential backoff.
the adapter waits until it senses the channel idle and then begins to transmit the frame.
the adapter begins to transmit the frame.
none of the above
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7.
In CSMA/CD, after the 3rd collision, what is the probability that the value of K that a node chooses is 2?
0
.25
.33
.125
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8.
When a switch transmits an Ethernet frame, the Ethernet frame has
the swtitch's LAN address for its source address
the swtitch's LAN address for its destination address
the broadcast address for the its source address
none of the above
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9.
The switch poisoning attack involves:
sending many packets to the switch with different bogus source IP addresses
sending many packets to the switch with different bogus destination IP addresses
sending many packets to the switch with different bogus source MAC addresses
sending many packets to the switch with different bogus destination MAC addresses
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10.
All link layer protocols that support IP have the same frame structure (i.e., length of frame, number and length of header fields).
True
False
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11.
CRC error detection, as used in Ethernet, is always able to detect whether there is an error in a frame.
True
False
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12.
The even parity bit scheme can correct single bit errors.
True
False
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13.
With CDMA, each sender uses the same code, Cm, m=1,...,M.
True
False
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14.
Each LAN adapter has a unique LAN address.
True
False
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15.
Consider a router with multiple ARP tables, one for each of its interfaces. No two of these ARP tables can contain the same LAN address.
True
False
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16.
Consider a twisted-pair Ethernet in which all nodes are 50 meters from the hub. The time it takes for a bit to propagate from hub to node for a 10BaseT Ethernet is ten times longer then for a 100BaseT Ethernet.
True
False
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17.
The entries in a switch table need to be configured by the network administrator.
True
False
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18.
Consider the switched LAN architecture in Figure 5.24. Assuming all links are full duplex, there are never collisions in this LAN.
True
False
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