Networking

Question 1

The fundamental operation of a client-server application is the __________which consists of a client
____________ followed by a server _____________.

Answer 1

Transaction
Request
Response

Question 2

An Ethernet segment consists of

Answer 2

A set of hosts connected through a hub

Question 3

Globally unique 48-bit address stored in NVRAM on network adapter:

Answer 3

MAC address

Question 4

A LAN consists of multiple segments connected by

Answer 4

Bridges

Question 5

How do bridges differ from hubs?

Answer 5

Bridges implement a distributed algorithm that allows each to “learn” over time which ports connect to which hosts, thereby reducing communication traffic. Hubs simply copy all received data from one host to all other connected hosts.

Question 6

LANs are connected using ________________ to form an internet.

Answer 6

routers

Question 7

Two capabilities provided by protocol software are ________ and _____.

Answer 7

Host naming scheme

Delivery mechanism

Question 8

A general packet consists of a _______ and a ______

Answer 8

Header

Payload

Question 9

A packet header usually contains:

Answer 9

source and destination addresses and size of payload

Question 10

In layered communication networks, the method of information hiding that treats the entire packet (header plus payload) from level k, as only the payload to which it adds a header at level k-1, is called

Answer 10

Encapsulation

Question 11

TCP/IP stands for

Answer 11

Transmission Control Protocol/Internet Protocol

Question 12

A TCP/IP packet is called a

Answer 12

Datagram

Question 13

Network byte order is

Answer 13

Big-endian

Question 14

The mapping between domain names and Internet hosts is maintained by

Answer 14

DNS

Question 15

Linux utility program that can be used to display IP addresses associated with a domain name

Answer 15

nslookup

Question 16

Each Internet host has a locally defined domain name called ______ that maps to ________

Answer 16

Localhost

127.0.0.1

Question 17

Linux command that displays domain name of local host:

Answer 17

hostname

Question 18

An Internet connection is characterized by three things

Answer 18

Point to point
Full duplex
Reliable

Question 19

A socket is the

Answer 19

end-point of a connection

Question 20

A socket address consists of

Answer 20

Internet address and port number

Question 21

The port that is assigned automatically by the kernel to a client making a connection request is called a(n)

Answer 21

Ephemeral port

Question 22

The port used by a server’s socket address (when it provides a common service) is called a(n)

Answer 22

well-known port

Question 23

Linux maintains a file with mappings between these kinds of services and ports. It is:

Answer 23

/etc/services

Question 24

A connection is uniquely defined by the socket addresses of its endpoints. This is called a

Answer 24

socket pair

Question 25

Sequence of functions called to allow a client to begin sending requests to a server

Answer 25

socket

connect

Question 26

Sequence of functions called to allow a server to begin receiving data from a client

Answer 26

socket
bind
listen
accept

Question 27

Name of the function used to return socket address information given a string representation of a host and/or service

Answer 27

getaddrinfo

Question 28

Name of the function used to return host name given socket address information:

Answer 28

getnameinfo