3DX7X Vol 1: Unit 4
Network Fundamentals
- 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
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