Network Fundamentals Quiz

What are hosts/end devices/edge devices in a network?

• Devices that manage network traffic

• End systems running network applications at the Internet's edge

• Protocols used for sending and receiving messages

• Infrastructure that provides services to applications

Answer explanation

Hosts/end devices/edge devices in a network refer to end systems running network applications at the Internet's edge.

What is the function of packet switches?

• To define the format of messages in a network

• To manage the collection of devices, routers, and links

• To forward packets of data to routers and switches

• To control the sending and receiving of messages

Answer explanation

Packet switches function to forward packets of data to routers and switches, allowing for efficient data transmission within a network.

What materials are communication links made of?

• Silicon, plastic, and glass

• Fiber, copper, radio, satellite

• Wood, metal, and rubber

• Concrete, steel, and vinyl

Answer explanation

Communication links are made of fiber, copper, radio, and satellite materials, which are the correct answer choice.

What does the Internet refer to in the context of network review?

• A single network managed by an organization

• A protocol for sending and receiving messages

• A network of networks, or interconnected ISPs

• The infrastructure for distributed applications

Answer explanation

The Internet refers to a network of networks, or interconnected ISPs, in the context of network review.

What is the purpose of a protocol in a network?

• To provide the infrastructure for applications

• To define the format and order of messages sent and received among network entities

• To forward packets to routers and switches

• To manage the collection of devices, routers, and links

Answer explanation

The purpose of a protocol in a network is to define the format and order of messages sent and received among network entities.

What is the RFC in Internet standards?

What organization is responsible for managing Internet standards?

(a)  

What is the link transmission rate also known as?

(a)  

How is the packet transmission delay calculated?

• L (bits) / R (bits/sec)

• R (bits/sec) / L (bits)

• L (packets) * R (packets/sec)

• R (packets/sec) * L (packets)

Answer explanation

The packet transmission delay is calculated by dividing the size of the packet (L in bits) by the transmission rate (R in bits/sec), so the correct formula is L (bits) / R (bits/sec).

What is the role of switches in a network?

• To break application-layer messages into packets

• To move arriving packets from router’s input link to the appropriate router output link

• To determine source-destination paths taken by packets

• To connect end systems to edge routers

Answer explanation

Switches in a network are responsible for moving arriving packets from router’s input link to the appropriate router output link.