15.3.3 Transport Layer Quiz Answers. Networking Basics Module 15 quiz exam answers
1. Which protocol operates at the application layer of the TCP/IP model?
2. What is a characteristic of UDP?
- It establishes sessions with a three-way handshake.
- It uses sequence numbers to reassemble segments.
- It adds 20 bytes of overhead to application layer data.
- It provides unreliable delivery of segments.
3. Which type of applications are best suited to use UDP as the transport layer protocol?
- applications that require flow control
- applications that require data to be reassembled in a specific order
- applications that require minimal transmission delay
- applications that require stateful sessions
4. A student is sending files from a phone to a computer across a network. Which layer of the TCP/IP model is responsible for reassembling these messages as they are received on the computer?
- network access
5. At which layer of the TCP/IP model does TCP operate?
- network access
6. What protocol header information is used at the transport layer to identify a target application?
- port number
- IP address
- sequence number
- MAC address
7. What type of port number is assigned by IANA to commonly used services and applications?
- well-known port
- registered port
- dynamic port
- private port
8. What is the purpose of using a source port number in a TCP communication?
- to notify the remote device that the conversation is over
- to assemble the segments that arrived out of order
- to keep track of multiple conversations between devices
- to inquire for a nonreceived segment
9. What is an advantage of UDP over TCP?
- UDP communication requires less overhead.
- UDP communication is more reliable.
- UDP reorders segments that are received out of order.
- UDP acknowledges received data.
10. When is UDP preferred to TCP?
- when a client sends a segment to a server
- when all the data must be fully received before any part of it is considered useful
- when an application can tolerate some loss of data during transmission
- when segments must arrive in a very specific sequence to be processed successfully
11. Which statement correctly describes data transmission at the transport layer?
- Retransmission of lost packets is provided by both TCP and UDP.
- Segmentation is provided by the window size field when the TCP protocol is used.
- A single datagram can include both a TCP and a UDP header.
- Both UDP and TCP use port numbers.
- Segmentation is provided by sequence numbers when UDP is used.