COMPUTER NETWORKS &
TELECOMMUNICATIONS EXAM
PRACTICE QUESTIONS WITH
SOLUTIONS
Which topology requires a central controller or hub?
Star, Mesh, Bus, Ring - Star
A ___ is a data communication system spanning states, countries, or the whole world.
LAN, MAN, WAN, None - WAN
A ___ is a set of rules that governs data communication.
Topology, Protocol, Standard, Syntax - Protocol
The ___ address uniquely defines a host on the Internet.
Physical, Port, IP, Specific - IP
The ___ address identifies a process on a host.
Physical, Port, IP, Specific - Port
When a host on network A sends a message to a host on network B, which address
does the router look at?
Physical, IP, Port, Specific - IP
The ___ layer establishes, maintains, and synchronizes the interactions between
communicating devices.
Physical, Transport, Session, Network - Session
The ___ layer is responsible for the process-to-process delivery of the entire message.
Physical, Transport, Network, Data Link - Transport
The ___ layer is responsible for the source-to-destination delivery of a packet across
multiple network links.
Physical, Network, Transport, Data Link - Network
The ___ layer is responsible for delivering data units from one station to the next without
errors.
, Physical, Network, Transport, Data Link - Data Link
The ___ layer coordinates the functions required to transmit a bit stream over a physical
medium.
Physical, Network, Transport, Data Link - Physical
A fully connected network with 5 nodes requires ___ cables.
5, 10, 15, 25 - 10
A virtual local area network (VLAN) is configured by ___.
Physical wiring, Hardware, Software, None - Software
Membership in a VLAN can be based on ___.
Port Numbers, MAC Addresses, IP Addresses, All - All
A three-layer switch is a kind of ___.
Repeater, Bridge, Hub, Router - Router
When displaying a web page, the application layer uses the ___.
HTTP protocol, FTP protocol, SMTP protocol, None - HTTP
Which of the following is an application layer service?
Network virtual terminal, Mail service, File transfer/access/management, All - All
In FTP protocol, client contacts server using ___ as the reliable transport protocol.
Transmission control protocol,
Datagram congestion control protocol,
User datagram protocol,
Stream control transmission protocol - Transmission control protocol
If 5 files are transferred from server A to client B in the same session. The number of
TCP connection (control and data connections) between A and B is ___.
10, 6, 5, 2 - 6
Which topology covers security, robust and eliminating traffic factor?
Mesh, Ring, Star, Bus - Mesh
Which multiple access technique is used by IEEE 802.11 standard for wireless LAN?
CDMA,
ALOHA,
CSMA/CA,
CSMA/CD - CSMA/CA
A BSS without an AP is called an ___.
Ad hoc network,
Connectionless network,
