3DX7X Vol 1: Unit 4

18 Questions | By Simba1021 | Updated: Mar 21, 2022 | Attempts: 292

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Network Fundamentals

Questions and Answers

1.

Network switches and bridges operate at what Open System Interconnect (OSI) layer?
- A.
  
  Network
- B.
  
  Physical
- C.
  
  Data Link
- D.
  
  Transport
2.

The Institute of Electrical and Electronics Engineers (IEEE) divides the Open System Interconnect (OSI) Data Link Layers into what two sublayers?
- A.
  
  High Level Data Link Control (HDLC) and Synchronous Data Link Control (SDLC)
- B.
  
  Logical Link Control (LLC) and Media Access Control (MAC)
- C.
  
  Distance Vector and Link State
- D.
  
  RS-232 and RS-530
3.

Routers operate at what Open System Interconnect (OSI) layer?
- A.
  
  Network
- B.
  
  Physical
- C.
  
  Data Link
- D.
  
  Transport
4.

Virtual circuits are established, maintained, and terminated at what Open System Interconnect (OSI) layer?
- A.
  
  Network
- B.
  
  Physical
- C.
  
  Data Link
- D.
  
  Transport
5.

What is the combat information technology (IT) communication support agency of the DoD called?
- A.
  
  Defense Intelligence Agency
- B.
  
  Defense Information System Agency
- C.
  
  Defense Information Systems Network
- D.
  
  Department of Defense Information Networks
6.

Who must provide encryption devices for connection to the Secret Internet Protocol (IP) Data service?
- A.
  
  The customer
- B.
  
  Security Manager
- C.
  
  National Security Agency
- D.
  
  Communications Squadron
7.

What are the two classifications of transport protocols?
- A.
  
  Connection Oriented and Connectionless Oriented
- B.
  
  Classful and Connectionless Oriented
- C.
  
  Connectionless Oriented and Classless
- D.
  
  Classful and Classless
8.

In a connection-oriented protocol, such as Transmission Control Protocol (TCP), what must happen before data is transmitted between clients?
- A.
  
  Authorization
- B.
  
  Connection establishment
- C.
  
  Establishment of a clear channel
- D.
  
  End-to-end connectivity between host applications
9.

What regulates how much information passes over a Transmission Control Protocol (TCP) connection before the receiving host must send an acknowledgement?
- A.
  
  Data receive message
- B.
  
  Sliding Window
- C.
  
  Buffer
- D.
  
  Socket
10.

Which of these lists the fields in the User Datagram Protocol (UDP) segment?
- A.
  
  Source Port, Destination Port, Length, Checksum, Data
- B.
  
  Source Port, Destination Port, Length, Windowing, Data
- C.
  
  Source Port, Destination Port, Length, Acknowledgement, Data
- D.
  
  Channel Clear, Source Port, Destination Port, Length, Checksum, Data
11.

How many bits are in an Internet Protocol version 4 (IPv4) address?
- A.
  
  16
- B.
  
  32
- C.
  
  64
- D.
  
  128
12.

What class uses a range of 1-126 in the first octet of an Internet Protocol version 4 (IPv4)?
- A.
  
  Class A
- B.
  
  Class B
- C.
  
  Class C
- D.
  
  Class D
13.

What Internet Protocol version 4 (IPv4) class address is used for networks with about 250 nodes?
- A.
  
  Class C
- B.
  
  Class D
- C.
  
  Class E
- D.
  
  Class F
14.

What Internet Protocol version 4 (IPv4) class address is used for multicast addressing?
- A.
  
  Class C
- B.
  
  Class D
- C.
  
  Class E
- D.
  
  Class F
15.

What Internet Protocol version 4 (IPv4) reserved address is used for loop back?
- A.
  
  0.0.0.0
- B.
  
  127.0.0.1
- C.
  
  207.55.157.255
- D.
  
  255.255.255.255
16.

Instead of using binary, how are Internet Protocol version 6 (IPv6) addresses expressed to be more user-friendly?
- A.
  
  Colon Hexadecimal Format
- B.
  
  Dotted Decimal Notation
- C.
  
  Hexadecimal
- D.
  
  Octal
17.

The range of well-known port numbers is
- A.
  
  1024 to 49151
- B.
  
  49152 to 65535
- C.
  
  0 to 1023
- D.
  
  0 to 1024
18.

Which common port contains Hyper Text Transfer Protocol (HTTP) servers and proxies?
- A.
  
  Port 80
- B.
  
  Port 110
- C.
  
  Port 443
- D.
  
  Port 8080