by jlit09


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If an Ethernet NIC detects an error in an arriving frame ________.
it simply drops the frame
Four networks are involved in transmissions from the source to the destination host. How many packets will there be along the way when the source host transmits a packet?
1
Four networks are involved in transmissions from the source to the destination host. How many frames will there be along the way when the source host transmits a packet?
4
Four networks are involved in transmissions from the source to the destination host. How many routers will there be along the way when the source host transmits a packet?
3
Four networks are involved in transmissions from the source to the destination host. How many routes will there be along the way when the source host transmits a packet?
1
Four networks are involved in transmissions from the source to the destination host. How many destination IP addresses will there be along the way when the source host transmits a packet?
1
Four networks are involved in transmissions from the source to the destination host. How many data link layer destination addresses will there be along the way when the source host transmits a packet?
4
Four networks are involved in transmissions from the source to the destination host. When the source host sends a packet, what will be the data link layer destination address in the frame in the first network?
The data link layer address of the first router.
Four networks are involved in transmissions from the source to the destination host. When the source host sends a packet, what will be the IP destination address in the packet in the first network?
The IP address of the destination host
How long are IP addresses?
32 bits
B7-23-DD-6F-C8-AB is an ________ address.
Ethernet
217.42.18.248 is an ________ address.
IP
At which layer would you find e-mail standards?
Application
An IP packet is encapsulated in ________.
a frame
An HTTP message is encapsulated in a(n) ________.
TCP Segment
Switches are called Layer ________ devices.
Layer 2
Routers are called Layer ________ devices.
Layer 3
A family of related standards is called a(n) ________.
architecture
Which of the following is a standards architecture?
OSI
Placing a message in the data field of another message is encapsulation.
true
On the receiving host, what does the internet layer process do to the transport layer message?
Passes it up to the transport layer
When a signal travels, this is called ________.
Propogation
Changes in a signal during propagation are called, most generally, ________.
Propagation effects
A ________ is a disturbance that propagates down the transmission medium to the other side, which reads it.
signal
In binary, 13 is 1101. What is 14?
1110
You have three bits. How many possibilities can you represent?
2^3 = 8
What is the binary equivalent of 3?
11
In 232 serial ports, +3 to +15 volts represents a ________.
0
In digital transmission, as the number of states increases, transmission speed ________.
increases
In the UTP wiring used in LANs, how many wires are there?
8
In the UTP wiring used in LANs, how many wire pairs are there?
4
In 4-pair UTP, what is twisted?
The wires in each pair are twisted around each other.
The outer covering of a UTP cord is called its ________.
jacket
Which transmission medium is dominant for the access line between a NIC and the switch that serves the NIC?
4-pair UTP
When a signal grows weaker as it travels, this is called ________.
attenuation
The noise floor is ________.
the average noise energy
In Ethernet, limiting UTP cord runs to 100 meters limits ________ to an acceptable level.
noise errors and attenuation
When a fluorescent light interferes with UTP transmission, this is ________.
EMI
When one pair in a UTP cord interferes with signals in other pairs, this is ________.
crosstalk interference
Twisting wires reduces ________.
EMI and Crosstalk interference
Untwisting wire pairs no more than 1.25 cm (a half inch) at their ends reduces ________.
terminal crosstalk interference
Serial transmission is transmission over a single wire pair.(TorF)
True
Parallel transmission is transmission over ________.
more than one wire pair
Which type of transmission is more widely used today?
Serial
UTP categories rate the ________ of cabling.
quality
Optical fiber users ________ signaling.
on/off
In LANs, UTP typically is used in ________.
access Lines
In LANs, optical fiber typically is used in ________.
trunk lines
In optical fiber, light travels through the ________.
core
The ability to transmit in two directions simultaneously is ________.
full-duplex communication
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