CS 6250 Computer Networks Exam 1
ACTUAL QUESTIONS AND CORRECT
ANSWERS
How did Licklider and his team in the early 1960s experiment with a precursor to the Internet? -
CORRECT ANSWER Connecting two computers over a dial up telephone line
What is the Domain Name System (DNS) designed to do primarily? - CORRECT
ANSWER Translate domain names into IP addresses
What is the architectural design of the Internet protocol stack based on? - CORRECT
ANSWER Layers
Both the data link and transports layer protocols may provide error correction - CORRECT
ANSWER True
What allows for communication between the application layer and the transport layer? - CORRECT
ANSWER Sockets
Which of the following protocols belong to the application layer?
Ethernet
IP (Internet Protocol)
DNS (Domain Name Service)
UDP (User Datagram Protocol) - CORRECT ANSWER DNS (Domain Name Service)
Which two protocols belong to the transport layer?
, UDP
TCP
HTTP
IP - CORRECT ANSWER UDP and TCP
When an application sends a packet of information across the network, this packet travels down the IP
stack and undergoes what process? - CORRECT ANSWER Encapsulation
According to the end-to-end principle, where should most of the Internet's functionality/intelligence
be implemented? - CORRECT ANSWER At the edges of a network
What is the difference between hubs, bridges, and routers? - CORRECT ANSWER They
operate on different layers of the IP stack
The transport layer protocols offer a logical connection between processes only if the hosts reside in
the same network - CORRECT ANSWER False
A sending host receives a message from the application layer and encapsulates it with the transport
layer header before passing it down to the network layer - CORRECT ANSWER True
An application running on a host can bind to multiple sockets simultaneously - CORRECT
ANSWER True
The identifier of a UDP socket is a tuple of destination IP address and port - CORRECT
ANSWER True
The identifier of a TCP socket is a tuple of source IP address and port - CORRECT
ANSWER False
UDP is considered more lightweight than TCP - CORRECT ANSWER True
ACTUAL QUESTIONS AND CORRECT
ANSWERS
How did Licklider and his team in the early 1960s experiment with a precursor to the Internet? -
CORRECT ANSWER Connecting two computers over a dial up telephone line
What is the Domain Name System (DNS) designed to do primarily? - CORRECT
ANSWER Translate domain names into IP addresses
What is the architectural design of the Internet protocol stack based on? - CORRECT
ANSWER Layers
Both the data link and transports layer protocols may provide error correction - CORRECT
ANSWER True
What allows for communication between the application layer and the transport layer? - CORRECT
ANSWER Sockets
Which of the following protocols belong to the application layer?
Ethernet
IP (Internet Protocol)
DNS (Domain Name Service)
UDP (User Datagram Protocol) - CORRECT ANSWER DNS (Domain Name Service)
Which two protocols belong to the transport layer?
, UDP
TCP
HTTP
IP - CORRECT ANSWER UDP and TCP
When an application sends a packet of information across the network, this packet travels down the IP
stack and undergoes what process? - CORRECT ANSWER Encapsulation
According to the end-to-end principle, where should most of the Internet's functionality/intelligence
be implemented? - CORRECT ANSWER At the edges of a network
What is the difference between hubs, bridges, and routers? - CORRECT ANSWER They
operate on different layers of the IP stack
The transport layer protocols offer a logical connection between processes only if the hosts reside in
the same network - CORRECT ANSWER False
A sending host receives a message from the application layer and encapsulates it with the transport
layer header before passing it down to the network layer - CORRECT ANSWER True
An application running on a host can bind to multiple sockets simultaneously - CORRECT
ANSWER True
The identifier of a UDP socket is a tuple of destination IP address and port - CORRECT
ANSWER True
The identifier of a TCP socket is a tuple of source IP address and port - CORRECT
ANSWER False
UDP is considered more lightweight than TCP - CORRECT ANSWER True
