Chapter 3 Transport Layer
1. A transport-layer protocol provides for logical communication between ____.
A Application processes
B Hosts
C Routers
D End systems
2. Transport-layer protocols run in ____.
A Servers
B Clients
C Routers
D End systems
3. In transport layer, the send side breaks application messages into ____, passes to
network layer.
A Frames
B Segments
C Data-grams
D bit streams
4. Services provided by transport layer include ____.
A HTTP and FTP
B TCP and IP
C TCP and UDP
D SMTP
5. Which of the following services is not provided by TCP?
A Delay guarantees and bandwidth guarantees
延迟保证和带宽保证
B Reliable data transfers and flow controls
C Congestion controls
D In-order data transfers
6. These two minimal transport-layer services----____ and ____----are the only two
services that UDP provides!
A process-to-process data delivery, error checking
B congestion control, reliable data transfer
C flow control, congestion control
D In-order data transfer, error checking
7. Port number’s scope is ____ to ____.
A 0, 1023
B 0, 65535
C 0, 127
D 0,255
8. The port numbers ranging from ____to ____ are called well-known port number
and are restricted.
A 0, 1023
B 0, 65535
C 0, 127
