Question 1

Which of the following is not a protocol used at the application layer.

Accepted Answer

UDP (User Datagram Protocol) is a transport layer protocol, not an application layer protocol. The other choices (HTTP, SMTP, FTP, and Telnet) are all application layer protocols.

Question 2

_______ is the dominant network protocol today and is in use in virtually every LAN and WAN in the world.

Accepted Answer

TCP/IP is the dominant network protocol used in LANs and WANs all over the world. It is a suite of communication protocols that are used to connect devices on the internet and is the most widely used network protocol for data communication.

Question 3

A TCP three-way handshake is used to establish a ___________ messaging method.

Accepted Answer

The TCP three-way handshake is a connection-oriented method used to establish communication between two devices. This method involves three steps, namely SYN, SYN-ACK, and ACK. The three-way handshake ensures that both devices agree to establish a reliable and error-free connection before proceeding with data transmission. Thus, option B, connection-oriented, is the best choice.

Question 4

The transport layer must break messages from the application layer into several _____ that can be sent to the network layer.

Accepted Answer

The transport layer breaks messages into segments, which are then passed on to the network layer for transmission. Segments are typically larger than frames, which are used at the data link layer, and contain information about the source and destination ports, sequence and acknowledgement numbers, and other control data.

Question 5

TCP/IP:

Accepted Answer

TCP/IP performs packetizing, routing, and addressing functions. It is a widely used network protocol for LANs and the internet.

Question 6

Transmission Control Protocol/Internet Protocol was developed for ________ in 1974.

Accepted Answer

TCP/IP was developed for ARPANET (Advanced Research Projects Agency Network), which was a predecessor to the modern-day internet.

Question 7

IP:

Accepted Answer

IP is utilized during routing functions, as it is the protocol responsible for forwarding packets between networks. IP performs packet routing, which involves determining the best path for a packet to travel from the sending host to the destination host.

Question 8

A typical TCP segment has a _______ header of control information.

Accepted Answer

The answer of A typical TCP segment has a _______...

Question 9

An application layer address using TCP/IPv4 looks like:

Accepted Answer

A TCP/IPv4 application layer address typically uses a domain name, such as www.cba.uga.edu. Option A is an example of an IPv4 network layer address, while option C is an example of an email address. Option D is a MAC address used in the data link layer, and option E is not an appropriate format for an application layer address in TCP/IPv4.

Question 10

TCP uses _____________ so that the destination station can reassemble the packets into the correct order.

Accepted Answer

TCP uses sequence numbers to ensure that the destination station can reassemble the packets in the correct order. Sequence numbers allow the receiver to identify which packet comes next and reconstruct the original message.

Question 11

The source port identifier of the received TCP segment tells the destination station _____________.

Accepted Answer

The source port identifier in a TCP segment indicates which application layer process (e.g., a specific program or service running on the computer) sent the packet, allowing the receiving system to direct the packet to the correct application.

Question 12

The older version of IP has a ________ header of control information.

Accepted Answer

The answer of The older version of IP has a...

Question 13

The negotiation by the transport layer at the sender with the transport layer at the receiver to determine what size packets should be set up is done via establishing an) ___________ between the sender and receiver.

Accepted Answer

The negotiation by the transport layer at the sender with the transport layer at the receiver to determine what size packets should be set up is done via establishing a TCP connection between the sender and receiver. TCP uses a three-way handshake to establish the connection and negotiate various parameters, including packet size. Therefore, option D is the correct answer. The other options are not related to packet size negotiation in the transport layer.

Question 14

______________ communication is most commonly used when the application data or message can fit into one single packet.

Accepted Answer

Connectionless communication is used when the application data or message can fit into one single packet, as it does not require a connection to be established between sender and receiver before sending the data. This type of communication is often used in applications such as video streaming, online gaming, and other real-time applications where a delay in establishing a connection could negatively impact the user experience.

Question 15

UDP is not commonly used for:

Accepted Answer

UDP is not commonly used for HTTP requests. HTTP relies on TCP for reliable delivery, whereas UDP does not provide reliability. Therefore, HTTP requests are typically sent over TCP rather than UDP. The other choices are commonly used with UDP. Network management control messages, RIP messages, DHCP addressing messages, and DNS requests are all examples of protocols that use UDP.

Question 16

With QoS routing different __________ are defined, each with different priorities.

Accepted Answer

QoS routing uses classes of service to prioritize traffic and ensure that critical traffic is given priority over less important traffic. The other options are not relevant to QoS routing.

Question 17

A client computer is typically assigned a data link layer address by a:

Accepted Answer

Data link layer addresses, also known as MAC (Media Access Control) addresses, are typically assigned by the hardware manufacturer of the network interface card (NIC) or integrated network interface.

Question 18

The newer form of IP, version 6 IPv6):

Accepted Answer

IPv6 has an increased address size from 32 bits to 128 bits, allowing for a much larger number of possible unique addresses compared to IPv4. Options A, B, D, and E are all incorrect as they do not accurately describe IPv6.

Question 19

Assume that more than one application program is using the same communications line on a particular computer. To be able to decide to which application program a message should be delivered on this computer, TCP/IP relies on the:

Accepted Answer

TCP/IP uses port addresses to distinguish between different application programs using the same communication line. Each application program is assigned a unique port number which is included in the header of the TCP/IP packets. This way, when a message arrives at a computer, the TCP/IP protocol uses the port number to route the message to the correct application program.

Question 20

With _____________ messaging, each UDP segment makes its own way through the network without the use of sequence numbers or acknowledgements.

Accepted Answer

Connectionless messaging is a type of communication where individual packets are sent from one computer to another without establishing a dedicated path for data transmission. In this case, each UDP segment makes its own way through the network without the use of sequence numbers or acknowledgements.

Quiz 5: Network and Transport Layers