# 21. App (application software) requires a member of transport services to function. Which choice best describes...

###### Question:

21. App (application software) requires a member of transport services to function. Which choice best describes the transport service required by an app? a. Reliable data transfer and long delay in transmission b. Good throughput and data integrity c. Data secunty and long delay in transmission d. long delay in transmission and poor timing 22. This transport protocol does not provide flow control reliability, congestion control, time or security. Which transport protocol is it? a. File transfer protocol b. Transmission control protocol c. User datagram protocol d. HTTP 23. The OSI/OSI model consist of 7 layers unlike the network layer with only five layers. Which choices correctly identify the missing layers in the network layer? a. Application and network link b. Transport and application c. Physical and network d. Presentation and session 24. What is the purpose of the UDP checksum? a. To keep track of email messages sent over the intemet b. Add the high bits before sending the message segments c. Detects errors in transmutted bits d. Count the bit segments to ensure that the correct number of segments were sent 25. What are the consequences of congestion on the network a. Loss of packets and long delays b. Good throughput and high bandaridth c. Drop of queuing data and fast transmission d. Delay is not a problem

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