1. Refer to the exhibit. What two pieces of information can
be determined from the output that is shown? (Choose two.)
The local host is using three client sessions.
The local host is using web sessions to a remote server.
2. After a web browser makes a request to a web server that
is listening to the standard port, what will be the source port number in the
TCP header of the response from the server?
80
3. Which information is found in both the TCP and UDP header
information?
source and destination
4. Which is an important characteristic of UDP?
minimal delays in data delivery
5. Refer to the exhibit. Host A is using FTP to download a
large file from Server 1. During the download process, Server 1 does not
receive an acknowledgment from Host A for several bytes of transferred data.
What action will Server 1 take as a result?
reach a timeout and resend the data that needs to be
acknowledged
6. Refer to the exhibit. In line 7 of this Wireshark
capture, what TCP operation is being performed?
session establishment
7. Refer to the exhibit. The initial TCP exchange of data
between two hosts is shown in the exhibit. Assuming an initial sequence number
of 0, what sequence number will be included in Acknowledgment 2 if Segment 6 is
lost?
3431
8. Why is flow control used for TCP data transfer?
to prevent the receiver from being overwhelmed by incoming
data
9. During a TCP communication session, if the packets arrive
to the destination out of order, what will happen to the original message?
The packets will be delivered and reassembled at the
destination.
10. With TCP/IP data encapsulation, which range of port
numbers identifies all well-known applications?
0 to 1023
11. Which transport layer protocol provides low overhead and
would be used for applications which do not require reliable data delivery?
UDP
12. What are two features of the User Datagram Protocol
(UDP)? (Choose two.)
low overhead
connectionless
13. What mechanism is used by TCP to provide flow control as
segments travel from source to destination?
window size
14. What is dynamically selected by the source host when
forwarding data?
source port
15. Why are port numbers included in the TCP header of a
segment?
to enable a receiving host to forward the data to the
appropriate application
16. Which two options represent Layer 4 addressing? (Choose
two.)
identifies the communicating applications
identifies multiple conversations between the hosts
17. Which three features allow TCP to reliably and
accurately track the transmission of data from source to destination?
flow control
session establishment
numbering and sequencing
18. Which OSI model layer is responsible for regulating the
flow of information from source to destination, reliably and accurately?
transport
19. Based on the transport layer header shown in the
diagram, which of the following statements describe the established session?
(Choose two.)
This contains a Telnet request.
This is a TCP header.
20. Which event occurs during the transport layer three-way
handshake?
TCP initializes the sequence numbers for the sessions.
21. Refer to the exhibit. Host1 is in the process of setting
up a TCP session with Host2. Host1 has sent a SYN message to begin session
establishment. What happens next?
Host1 sends a segment with the ACK flag = 0, SYN flag = 0 to
Host2.
Host2 sends a segment with the ACK flag = 1, SYN flag = 1 to
Host1.
CCNA 1 Chapter 4 Answers |
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