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.......... is a new version of X.25 that also relies on packet switching?
a. DSL
b. ISDN
c. frame relay
d. ATM
frame relay
..........converts digital signals to analog signals for use with ISDN phones and other analog devices?
a. terminal adapter
b. DSLAM
c. smart jack
d. terminator
A. terminal adapter
a ...........aggregates multiple DSL subscriber lines and connects them to a carrier's CO?
DSLAM
......... is the  preferred communications protocol for remote access communications?
PPP
............ is the standard for connecting home computers to and ISP via DSL or broadnad cable?
PPPOE
a unique characteristic of the 802.11 data frame is its .......  ....... field?
Sequence control
The average geographic range for an 802.11a antenna is .....meters?
20 meters
......... may use either the 2.4GHz or 5GHz frequemcy range?
802.11N
.........is an 802.11n network that allows the combination of multiple frames into one larger frame?
Frame aggregation
if intermitten and difficult to diagnose wireless communication error occur, ........might be the culprit?
interferance
In modulation a simple wave called a __wave is combined withanother analog signal to produce a unique signal that gets transmitted from one node to another.
Carrier
What is the that technology used with fiber optic cable, which enables one fiber optic connection to carry multiple light signals simultaneously?
Wavelength division
EIA/TIA has codified a popular serial data transmission method known as?
RS-232
What type of connector is used in RS-232 transmissions?
DB-25
which standard is known as a structured cabling?
TIA/EIA's 568 commercial building wiring standard
the point where circuits interconnect with other circuits?
cross connect facilities
__is the subprotocol that enables TCP/IP to interwork--that is, to traverse more than one LAN segment and mor than one type of network through a router.
IP
The UDP's header contains how many fields?
4
source port
destination port
length
checksum
__operates at the network layer and manages multicasting
IGMP
internet group management (multicast) portocol
_address represents any one interface from a group of interfaces, any one of which can accept a trasnmission
anycast
A __ or a variable-length field at the beginning of the address that indicates what type of address it is.
Format prefix
__is a simple application layer protocol used to synchronize the clocks of computers on a network
NTP
__ is a term used by networking professionals to describe the nondata information that must accompany data for a signal to be properly routed and interpeted by the network
overhead
What kind of media does 10GBaseT uses?
Twisted pair
What is the most common 1G Ethernet used today?
1000Base-LX
What is the maximum throughput of a 1000Base-FX?
1GIG
What does the L stand for in 10GBase-LR?
Long reach
With in an Ethernet frame types
........., signals to the receiving node that the data is incoming and indicated when the data flow is about to begin?
Preamble
How many bytes of information can an Ethernet frame contain?
46 to 1500
What does ethernet2 has that makes it different from the older Ethernet?
2 byte field type
The …………NIC LED is blinking, that indicates that the NIC is functional and receiving frames?
RX
……………is the circuit board wire over which a device issues voltage to signal this request?
Interrupt
……………. Specifies, in hexadecimal notation, which area of the memory will act as a channel for moving data between the NIC and CPU?
BASE I/O PORT
All Ethernet networks, independent of their speed or frame type, use an access method called what?
CSMA/CD
Which 10G fiber optic standard has the shortesr segment length?
10GBASE-SR
To eliminate the possibility of  a broadcast storm switches and bridges implement …………………?
STP spanning tree protocol
A _________ is a list that organizes resources and associates them with their characteristics
Directory
A _________ is a pictorial representation of computer functions that in the case of NOSs, enables administrators to manage files, users, groups, and so on.
GUI
Active directory organizes multiple domains hierarchy in a domain ________.
TREE
Naming or addressing conventions in active directory are based on the ________ naming convention.
LDAP
Unix was one of the first operating systems to implement a ______ file system
hierachial
Solaris employs a file system called _______ for its naming file system type.
UFC
The gateways that make up the internet backbone are called_____ gateways.
CORE
SMTP operates at port____.
25
The standard message format specifies SMTP allowed over lines that contain no more than ____ ASCII characters.
1000
POP3 relies on TCP and operates on port ____.
110
A program similar to MTR ______ is available at the command line utility in windows XP, Vista, server 2003, and server 2008.
Path Ping
A service on the client workstation called the _____ intercepts a request to determine whether it should be handled by the client or server
Redirector
In LDAP compatible directories, a ____ is a set of definitions of kinds of objects and object related information that the directory can contain.
Schemea
____ is a standard for coding and interpreting binary files, images ir data with an email message.
MIME
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