Data Communication Exam 1 Answers
By: illumin0s • December 6, 2015 • Exam • 1,346 Words (6 Pages) • 1,787 Views
Name: _____________________________
Max Points: 36
Max Time: 60 min
TRUE / FALSE
1. A local area network (LAN) connects other LANs and BNs located in different areas to each other and to wide area networks in a span from 3 to 30 miles. [False – LAN less than 3 miles]
2. Network standards permit customers to purchase hardware and software from different vendors, as long as the equipment meets the standards [True]
3. In the formal standardization process, the identification of choices stage consists of defining the solution and getting recognized industry leaders to agree on a single, uniform solution. [False – Acceptance stage]
4. An application architecture is the way in which the functions of the application layer are performed
solely by the clients in the network. [False – The functions are spread across clients and servers]
5. One function done by any application program is application logic [True]
6. Data access logic refers to the processing required to access data. [True]
7. For wide area networks, circuits may be provided by various common carriers, such as Sprint. [True]
8. In twisted pair wires, the ‘twisting’ minimizes the electromagnetic interference. [True]
9. One advantage of coaxial cable over low cost twisted pair wires is that coax cables are less susceptible to interference. [True]
10. Message delineation refers to the control that is needed when computers transmit. [False – Controlled bit to start/stop of the message]
11. Two fundamental approaches to media access control are: controlled access and multiplexing. [False – Controlled access and contention]
12. Most computer networks managed by a host mainframe computer use contention media access control. [False – use controlled access]
13. To help determine to which application a transmission should be delivered on a particular computer, TCP uses the application layer port addresses to distinguish among many open applications on a computer. [True]
14. Because there is a limit on the length of a frame that the data link layer can transmit from node to node, the transport layer breaks up the message from the application layer into several smaller packets. [True]
15. Connectionless routing sets up a TCP connection, or virtual circuit between a sender and receiver. [False – That’s connection-oriented routing]
16. A Network Operating System (NOS), such as Novell or Windows NT, must be used in addition to the ‘normal’ operating system, such as Windows, on a server in a dedicated server LAN. [False – NOS replaces traditional OS]
17. By offloading printing tasks from the main LAN server, a print server increases network efficiency. [True]
18. The Network Interface Card (NIC) permits a computer to be physically connected to a network’s cable, which provides the network layer connection among the computers in the network. [False – All correct except it’s all on Physical layer, not Network layer]
MULTIPLE CHOICE
19. A server computer:
- is the pathway through which messages travel
- is a special device that connects two or more networks
- is the input/output device at one end of a communication circuit
- is a computer that stores data or software that can be accessed by client computers
- is always a mainframe computer
Answer: d
20. A client:
- is the pathway through which messages travel
- is a special device that connects two or more networks
- is typically copper wire
- stores data and software that can be used by computers on the network
- is the input/output hardware device at the user’s end of a communications circuit
Answer: e
21. The circuit:
- is the pathway through which messages travel
- is also called a host
- is the input/output device at the user’s end of a communication circuit
- is a computer that stores data or software that can be accessed by client computers
- is also called a terminal
Answer: a
22. ________ is the presentation of information to the user and the acceptance of the user’s commands.
- data storage
- data access logic
- application logic
- presentation logic
- application access storage
Answer: d
23. One underlying problem with a host-based network is that:
- there are economies of scale because all computer resources are centralized
- the server can get overloaded since it must process all messages
- the architecture is relatively simple and works well
- the server is the one point of control which simplifies security
- clients (terminals) do not require sophisticated hardware/software because they do not perform most of the work in this type of architecture
Answer: b
24. Because many large organizations had application development backlogs of two to three years, many managers developed their own __________ -based applications in a few months.
- mainframe
- mini-computer
- microcomputer
- dumb terminal
- cluster
Answer: c
25. Which of the following is not a key advantage of digital transmission?
- It permits only low transmission rates.
- It is more efficient.
- It is simpler to integrate voice, video, and data on the same circuit.
- It is more secure.
- It produces fewer errors.
Answer: a
26. In the future, most long distance transmission (voice, data, and video) will be sent using:
- analog transmission
- digital transmission
- unipolar signaling
- analog transmission
- infrared linking
Answer: b
27. A(n) __________ circuit is another name for a multipoint configuration.
...