Network layers

Which layer does TCP operate on?

• Application

• Transport

• Network

• Link

Answer explanation

TCP operates on the Transport layer, which is responsible for providing reliable communication between devices. It ensures data is sent and received accurately, distinguishing it from the Application, Network, and Link layers.

Which layer does IP operate on?

• Application

• Transport

• Internet

• Link

Answer explanation

IP operates on the Internet layer of the TCP/IP model, which is responsible for routing packets across networks. This distinguishes it from the Application, Transport, and Link layers.

Which topology is shown in the picture?

• Star

• Bus

• Mesh

• Ring

Answer explanation

The star topology is characterized by a central hub or switch to which all devices are connected. This allows for easy management and isolation of devices, making it the correct choice for the given question.

Which topology is this a picture of?

• Star

• Bus

• Mesh

• Ring

Answer explanation

The bus topology connects all devices to a single central cable, or 'bus'. In the picture, if all nodes are connected along a single line, it represents a bus topology, making 'Bus' the correct answer.

Which protocol is used for sending emails?

• POP3

• IMAP

• SMTP

• FTP

Answer explanation

SMTP (Simple Mail Transfer Protocol) is the standard protocol used for sending emails. In contrast, POP3 and IMAP are used for retrieving emails, while FTP is for file transfers.

Which best describes packet switching?

• Exchanging information in two directions

• Sending data in small chunks

• Stealing data by exchanging other data for it

• Sending data twice to be sure it arrives

Answer explanation

Packet switching involves sending data in small chunks, or packets, which can travel independently through the network. This method is efficient and allows for better use of network resources compared to other methods.

Layers are groups of _______ with similar functions.

• Programs

• Functions

• Protocols

• Procedures

Answer explanation

Layers are groups of protocols with similar functions, as protocols define rules for communication between devices. Other options like programs, functions, and procedures do not accurately describe the grouping in networking layers.

Layers allow for data to be passed over a network regardless of the hardware being used.

• True

• False

Answer explanation

True. Layers in networking, such as the OSI model, abstract the data transmission process, allowing communication between devices with different hardware by standardizing protocols.

What is a network protocol?

• A shape of a network, such as star

• A set of rules for sharing data over a network

• The requirements for passwords, such as length

• The size of a network, such as WAN

Answer explanation

A network protocol is defined as a set of rules for sharing data between devices. This ensures proper communication and data exchange, making the second choice the correct answer.

Which of the four layers in TCP/IP chooses the route the data will take?

• Application

• Internet

• Link

• Transport

Answer explanation

The Internet layer in the TCP/IP model is responsible for routing data packets across networks. It determines the best path for data to travel from the source to the destination, making it the correct choice.