CNT – CCAHM
PRACTICE EXAM QUESTIONS
WITH CORRECT DETAILED
ANSWERS | ALREADY GRADED
A+<RECENT VERSION>
1. Data communications deals with the transmission of signals in a reliable and efficient
manner - ANSWER true
2. Changes in corporate data traffic patterns are driving the creation of high-speed
WANs - ANSWER true
3. A modem is required to establish communication between a workstation and a server
over a public telephone network - ANSWER true
4. Compression refers to the ability of a number of devices to share a transmission
facility - ANSWER false
5. The basic building block of any communications facility is the transmission line -
ANSWER true
6. Developing switching systems with the capacity and rapid response to support the
demand requirements with the increased use of fiber optic transmission is no longer a
challenge - ANSWER false
,7. Frame relay networks are commonly used for terminal-to-computer and computer-to-
computer communications - ANSWER false. Packet-switching networks are
commonly used
8. The LAN is owned by the same organization that owns the attached devices -
ANSWER true
9. Enterprises have formed ____ to reach customers, suppliers, and partners while
isolating their proprietary information from unwanted access - ANSWER intranets
and extranets
10. A dominant architecture in the business environment and the more recent Web-
focused intranet trend is _________ computing - ANSWER client/server
11. The key elements of a simple communications model are - ANSWER source,
transmission, destination
12. DWDM enables capacities of ____ per second - ANSWER terabits
13. An _____ uses Internet and Web technology in an isolated facility internal to an
enterprise - ANSWER intranet
14. A network in which small chunks of data are passed through the network from node to
node, and at each node the entire data chunk is received, stored briefly, and then
transmitted to the next node, is a _____ network - ANSWER packet switching
15. In order for data processing devices to communicate certain conventions must be
decided on. These requirements can collectively be termed _____ - ANSWER
exchange management
,16. In situations in which an information exchange is interrupted due to a fault
somewhere in the system, ____ techniques are needed to either resume activity at the
point of interruption or to restore systems to their state prior to the beginning of the
exchange - ANSWER recovery
17. In a _____ network, a dedicated communications path is established between two
stations through the nodes of the network. The telephone network is the most common
example - ANSWER circuit switching
18. A _____ is a physical facility that provides the infrastructure to move data between
connected networks - ANSWER NAP / network access provider
19. Individual hosts and LANs are connected to an Internet Service Provider through a
___ - ANSWER POP / point of presence
20. The place where telephone companies terminate customer lines and locate switching
equipment to interconnect those lines with other networks is the ___ - ANSWER
CO / central office
21. Today's networks can offer differing levels of ______, which include specifications
for maximum delay and minimum throughput - ANSWER QoS / quality of service
22. An _____ extends a company's intranet out onto the Internet to allow selected
customers, suppliers, and mobile workers to access the company's private data and
applications - ANSWER extranet
23. ______ is required to assure that the source does not overwhelm the destination by
sending data faster than they can be processed and absorbed. - ANSWER flow
control
, 24. Networks that generally cover a large geographical area, require the crossing of public
right-of-ways, consists of a number of interconnected switching nodes, and rely on
circuits provided by a common carrier are _____ - ANSWER wide area networks
25. Using fixed length packets and sometimes referred to as cell relay, _______ is a
culmination of developments in circuit switching and packet switching. It is so
efficient that it can offer a constant data rate channel even though it is using a packet
switching technique - ANSWER asynchronous transfer mode
26. _______ networks provide advantages in the areas of mobility and ease of installation
and configuration. - ANSWER wireless
27. The Internet evolved from the ____ which was developed in 1969 by the Advanced
Research Projects Agency of the U.S Department of Defense - ANSWER
ARPANET
28. Communicating across arbitrary, multiple, packet-switched networks is _____ -
ANSWER internetworking
29. Each IP packet includes an unique numeric address of the destination host. This
address is referred to as an ________ - ANSWER IP address
30. __________ is the process of squeezing the data down so that a lower capacity,
cheaper transmission facility can be used to meet a given demand - ANSWER
compression
31. The OSI protocol architecture consists of 5 layers: physical, network access, internet,
transport, and application - ANSWER true
32. Procedures needed to allow data to transverse multiple interconnected networks is
found in the internet layer of the TCP/IP protocol architecture - ANSWER true
PRACTICE EXAM QUESTIONS
WITH CORRECT DETAILED
ANSWERS | ALREADY GRADED
A+<RECENT VERSION>
1. Data communications deals with the transmission of signals in a reliable and efficient
manner - ANSWER true
2. Changes in corporate data traffic patterns are driving the creation of high-speed
WANs - ANSWER true
3. A modem is required to establish communication between a workstation and a server
over a public telephone network - ANSWER true
4. Compression refers to the ability of a number of devices to share a transmission
facility - ANSWER false
5. The basic building block of any communications facility is the transmission line -
ANSWER true
6. Developing switching systems with the capacity and rapid response to support the
demand requirements with the increased use of fiber optic transmission is no longer a
challenge - ANSWER false
,7. Frame relay networks are commonly used for terminal-to-computer and computer-to-
computer communications - ANSWER false. Packet-switching networks are
commonly used
8. The LAN is owned by the same organization that owns the attached devices -
ANSWER true
9. Enterprises have formed ____ to reach customers, suppliers, and partners while
isolating their proprietary information from unwanted access - ANSWER intranets
and extranets
10. A dominant architecture in the business environment and the more recent Web-
focused intranet trend is _________ computing - ANSWER client/server
11. The key elements of a simple communications model are - ANSWER source,
transmission, destination
12. DWDM enables capacities of ____ per second - ANSWER terabits
13. An _____ uses Internet and Web technology in an isolated facility internal to an
enterprise - ANSWER intranet
14. A network in which small chunks of data are passed through the network from node to
node, and at each node the entire data chunk is received, stored briefly, and then
transmitted to the next node, is a _____ network - ANSWER packet switching
15. In order for data processing devices to communicate certain conventions must be
decided on. These requirements can collectively be termed _____ - ANSWER
exchange management
,16. In situations in which an information exchange is interrupted due to a fault
somewhere in the system, ____ techniques are needed to either resume activity at the
point of interruption or to restore systems to their state prior to the beginning of the
exchange - ANSWER recovery
17. In a _____ network, a dedicated communications path is established between two
stations through the nodes of the network. The telephone network is the most common
example - ANSWER circuit switching
18. A _____ is a physical facility that provides the infrastructure to move data between
connected networks - ANSWER NAP / network access provider
19. Individual hosts and LANs are connected to an Internet Service Provider through a
___ - ANSWER POP / point of presence
20. The place where telephone companies terminate customer lines and locate switching
equipment to interconnect those lines with other networks is the ___ - ANSWER
CO / central office
21. Today's networks can offer differing levels of ______, which include specifications
for maximum delay and minimum throughput - ANSWER QoS / quality of service
22. An _____ extends a company's intranet out onto the Internet to allow selected
customers, suppliers, and mobile workers to access the company's private data and
applications - ANSWER extranet
23. ______ is required to assure that the source does not overwhelm the destination by
sending data faster than they can be processed and absorbed. - ANSWER flow
control
, 24. Networks that generally cover a large geographical area, require the crossing of public
right-of-ways, consists of a number of interconnected switching nodes, and rely on
circuits provided by a common carrier are _____ - ANSWER wide area networks
25. Using fixed length packets and sometimes referred to as cell relay, _______ is a
culmination of developments in circuit switching and packet switching. It is so
efficient that it can offer a constant data rate channel even though it is using a packet
switching technique - ANSWER asynchronous transfer mode
26. _______ networks provide advantages in the areas of mobility and ease of installation
and configuration. - ANSWER wireless
27. The Internet evolved from the ____ which was developed in 1969 by the Advanced
Research Projects Agency of the U.S Department of Defense - ANSWER
ARPANET
28. Communicating across arbitrary, multiple, packet-switched networks is _____ -
ANSWER internetworking
29. Each IP packet includes an unique numeric address of the destination host. This
address is referred to as an ________ - ANSWER IP address
30. __________ is the process of squeezing the data down so that a lower capacity,
cheaper transmission facility can be used to meet a given demand - ANSWER
compression
31. The OSI protocol architecture consists of 5 layers: physical, network access, internet,
transport, and application - ANSWER true
32. Procedures needed to allow data to transverse multiple interconnected networks is
found in the internet layer of the TCP/IP protocol architecture - ANSWER true
