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WorksheetsNetwork & Telecommunication (101-150)
Total questions: 47
Worksheet time: 34mins
Câu 101: To deliver a message to the correct application program running on a host, the _______ address must be consulted.
IP
MAC
Port
None of the mentioned
Câu 102: Which is a time-sensitive service?
File transfer
File download
Internet telephony
Câu 103: Transport services available to applications in one or another form _________
Reliable data transfer
Timing
Security
All of the mentioned
Câu 104: Electronic mail uses which Application layer protocol?
SMTP
HTTP
FTP
SIP
Câu 105: The entire hostname has a maximum of ___________
a) 255 characters
b) 127 characters
c) 63 characters
d) 31 characters
Câu 106: A DNS client is called _________
a) DNS updater
b) DNS resolver
c) DNS handler
d) none of the mentioned
Câu 107: Servers handle requests for other domains _______
a) directly
b) by contacting remote DNS server
c) it is not possible
d) none of the mentioned
Câu 108: DNS database contains _______
a) name server records
b) hostname-to-address records
c) hostname aliases
d) all of the mentioned
Câu 109: If a server has no clue about where to find the address for a hostname then _______
a) server asks to the root server
b) server asks to its adjacent server
c) request is not processed
d) none of the mentioned
Câu 110: Which one of the following allows clients to update their DNS entry as their IP address changes?
a) dynamic DNS
b) mail transfer agent
c) authoritative name server
d) none of the mentioned
Câu 111: Wildcard domain names start with label _______
a) @
b) *
c) &
d) #
Câu 112: The right to use a domain name is delegated by domain name registers which are accredited by _______
a) internet architecture board
b) internet society
c) internet research task force
d) internet corporation for assigned names and numbers
Câu 113: The domain name system is maintained by _______
a) distributed database system
b) a single server
c) a single computer
d) none of the mentioned
Câu 114: Which one of the following is not true?
a) multiple hostnames may correspond to a single IP address
b) a single hostname may correspond to many IP addresses
c) a single hostname may correspond to a single IP address
d) none of the mentioned
Câu 115: A piece of icon or image on a web page associated with another webpage is called ______
a) url
b) hyperlink
c) plugin
d) extension
Câu 116: Dynamic web page ______
a) is same every time whenever it displays
b) generates on demand by a program or a request from browser
c) both is same every time whenever it displays and generates on demand by a program or a request from browser
d) is different always in a predefined order
Câu 117: What is a web browser?
a) a program that can display a web page
b) a program used to view html documents
c) it enables user to access the resources of internet
d) all of the mentioned
Câu 118: Common gateway interface is used to _______
a) generate executable files from web content by web server
b) generate web pages
c) stream videos
d) download media files
Câu 119: URL stands for ________
a) unique reference label
b) uniform reference label
c) uniform resource locator
d) unique resource locator
Câu 120: A web cookie is a small piece of data that is _______
a) sent from a website and stored in user’s web browser while a user is browsing a website
b) sent from user and stored in the server while a user is browsing a website
c) sent from root server to all servers
d) sent from the root server to other root servers
Câu 121: Which one of the following is not used to generate dynamic web pages?
a) PHP
b) ASP.NET
c) JSP
d) CSS
Câu 122: An alternative to JavaScript on windows platform is _______
a) VBScript
b) ASP.NET
c) JSP
d) PHP
Câu 123: What is a document object model (DOM)?
a) convention for representing and interacting with objects in html documents
b) application programming interface
c) hierarchy of objects in ASP.NET
d) scripting language
Câu 124: The TTL field has value 10. How many routers (max) can process this datagram?
11
5
10
1
Câu 125: If the value in protocol field is 17, the transport layer protocol used is _____________
a) TCP
b) UDP
c) ICMP
d) IGMP
Câu 126: The data field cannot carry which of the following?
a) TCP segment
b) UDP segment
c) ICMP messages
d) SMTP messages
Câu 127: What should be the flag value to indicate the last fragment?
0
1
TTl value
Protocol field value
Câu 128: Which of these is not applicable for IP protocol?
a) is connectionless
b) offer reliable service
c) offer unreliable service
d) does not offer error reporting
Câu 129: Which of the following demerits does Fragmentation have?
a) complicates routers
b) open to DOS attack
c) overlapping of fragments.
d) all of the mentioned
Câu 130: Which field helps to check rearrangement of the fragments?
a) offset
b) flag
c) TTL
d) identifier
Câu 134: In classless addressing, there are no classes but addresses are still granted in ______
a) IPs
b) Blocks
c) Codes
d) Sizes
Câu 135: In IPv4 Addresses, classful addressing is replaced with ________
a) Classless Addressing
b) Classful Addressing
c) Classful Advertising
d) Classless Advertising
Câu 136: First address in a block is used as network address that represents the ________
a) Class Network
b) Entity
c) Organization
d) Codes
Câu 137: In classful addressing, a large part of available addresses are ________
a) Organized
b) Blocked
c) Wasted
d) Communicated
Câu 138: Network addresses are a very important concept of ________
a) Routing
b) Mask
c) IP Addressing
d) Classless Addressing
Câu 139: Which of this is not a class of IP address?
Class E
Class C
Class D
Class F
Câu 140: A local telephone network is an example of a _______ network.
a) Packet switched
b) Circuit switched
c) Bit switched
d) Line switched
Câu 141: Most packet switches use this principle ____________
a) Stop and wait
b) Store and forward
c) Store and wait
d) Stop and forward
Câu 142: If there are N routers from source to destination, the total end to end delay in sending packet P(L-> number of bits in the packet R-> transmission rate) is equal to ______________
N
(N*L)/R
(2N*L)/R
L/R
Câu 143: What are the Methods to move data through a network of links and switches?
a) Packet switching and Line switching
b) Circuit switching and Line switching
c) Line switching and bit switching
d) Packet switching and Circuit switching
Câu 144: The required resources for communication between end systems are reserved for the duration of the session between end systems in ________ method.
a) Packet switching
b) Circuit switching
c) Line switching
d) Frequency switching
Câu 145: As the resources are reserved between two communicating end systems in circuit switching, ___________ is achieved.
a) authentication
b) guaranteed constant rate
c) reliability
d) store and forward
Câu 146: In _________ systems, resources are allocated on demand.
a) packet switching
b) circuit switching
c) line switching
d) frequency switching
Câu 147: Which of the following is not an application layer service?
a) Network virtual terminal
b) File transfer, access, and management
c) Mail service
d) Error control
Câu 148: _____________ allows LAN users to share computer programs and data.
a) Communication server
b) Print server
c) File server
d) Network
Câu 149: With respect to physical media, STP cables stands for _________
a) Shielded Twisted Pair Cable
b) Spanning Tree Protocol Cable
c) Static Transport Protocol Cable
d) Shielded Two Power Cable
Câu 150: A standalone program that has been modified to work on a LAN by including concurrency controls such as file and record locking is an example of ___________
a) LAN intrinsic software
b) LAN aware software
c) Groupware
d) LAN ignorant software
