- Serraph105
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17Oct 07
more good stuff
In the OSI model, which layer provides the interface to users and is responsible for formatting user data before passing it to the lower layers for transmission to a remote host?
7
Which of the following is the most vulnerable to security breaches?
WLAN
A ____ is typically a cluster of personal computers or workstations located in the same general area
LAN
Carrier sense multiple access (CSMA) is a ____-based protocol.
contention
The ____ is the specific set of rules used to control the flow of messages through the network.
protocol
A ____ is an internetworking device, primarily software driven, which directs traffic between two different types of LANs or two network segments with different protocol addresses.
router
In the ____ approach, the destination and sequence number of the packet is added to the information uniquely identifying the message to which the packet belongs; each packet is then handled independently and a route is selected as each packet is accepted into the network
datagram
Usually, the term "____" indicates a specific location in a network containing one or more computer systems
site
What is the maximum circumference for a MAN?
100 kilometers
High-speed LANs have a data rate that varies from 100 megabits per second to more than ____ per second.
40 gigabits
When using a bus topology, how many sites can successfully send a message at a time?
1
Consider the address someone@icarus.lis.pitt.edu. What is the host name in this address?
XXXXpitt
When using CSMA/CD, how long do nodes wait to retransmit after a collision?
a random period
What is a good example of a circuit-switched network?
telephone system
In which topology are hosts connected to one another in a linear fashion?
bus
- Posted Oct 17, 2007 6:44 pm GMT
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- 2 Comments
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17Oct 07
my stuff
For a movable head device, which of the following contributes the most to the total access time for a record?
seek time To write data to flash memory, an electric charge is sent through one transistor, called the ____, then through a metal oxide layer, and into a second transistor called the control gate where the charge is stored in a cell until it's erased.
floating gate A dual-layer, single-sided DVD (Digital Versatile Disc) can hold the equivalent of ____ CDs.
13In a fixed-head magnetic disk, each circle is called a ____.
The data-transfer rate for an optical disc is measured in ____ and refers to the speed at which massive amounts of data can be read from the disc.
track
Selected Answer:
KBps Which is the seek strategy in which the request with the track closest to the one being served is the next to be satisfied?
FCFSWhich RAID level requires two different parity calculations?
6 At the start of an I/O command, what information passed from the CPU to the channel?
All of the above The advent of optical discs was made possible by developments in ____ technology.
laser The number of characters that can be recorded per inch on a magnetic tape is determined by the ____ of the tape.
density How many bits make up the Channel Status Word (CSW)?
3____ devices are assigned to only one job at a time.
Dedicated Which of the following is true of an optical disc
there is only one trackThe I/O ____ allocates the devices, control units, and channels
scheduler The software used to create a CD-R uses a standard format, such as ____, which automatically checks for errors and creates a table of contents, used to keep track of each file's location.
ISO 9096 - Posted Oct 17, 2007 5:23 pm GMT
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