NWT Revision 1 (OSI & TCPIP)

Why are the pairs of wires twisted together in UTP cable?

• Twisting of wires makes it lighter
• Twisting of wires makes it thinner
• Twisting of wires makes it less expensive
• Twisting of wires reduces interference problem

Hub is a device that

• act as a central node in a network to connect up all the computers
• makes a forwarding decision for each packet that arrives at the gateway interface
• reduce the unnecessary overhead of all hosting needing to know all addresses
• divides large networks so that hosts who need to communicate are grouped together reduces the traffic across the internetworks

In Star topology, all data communications and traffic must pass through the

• bridge
• hub only
• switch only
• centralised switch/hub

What is the maximum number of hosts that a Class C network can have?

• 254
• 255
• 256
• 258

A set of rules and formats used to control and establish a communication link between two or more devices is knows as a

• Contract
• Protocol
• Document
• Specification

Which one of the following protocols is used in the Application layer of TCP/IP model?

• UDP
• Telnet
• ICMP
• IGMP

Which one of the following commands discovers the network path of Internet routers that packets take as they are forwarded from your computer to a destination address?

• Arp -a
• Ping
• Traceroute
• Ipconfig /displaydns

The acronym UTP stands for

• Unshielded Transmission Pair
• Universally Twisted Pair
• Unbounded Twin Pair
• Unshielded Twisted Pair

In TCP/IP model, TCP stands for

• Traffic Control Protocol
• Transmission Connection Protocol
• Transmission Control Protocol
• Telephony Connection Protocol

Both TCP and UDP belong to which layer of the OSI reference model?

• Network layer
• Session layer
• Data link layer
• Transport layer