Chapter 14-15 Mock Flashcards
A PC is downloading a large file from a server. The TCP window is 1000 bytes. The server is sending the file using 100-byte segments. How many segments will the server send before it requires an acknowledgment from the PC?
10 segments
1 segment
100 segments
1000 segments
10 segments
What are three responsibilities of the transport layer? (Choose three.)
identifying the applications and services on the client and server that should handle transmitted data
multiplexing multiple communication streams from many users or applications on the same network
directing packets towards the destination network
conducting error detection of the contents in frames
meeting the reliability requirements of applications, if any
formatting data into a compatible form for receipt by the destination devices
identifying the applications and services on the client and server that should handle transmitted data
multiplexing multiple communication streams from many users or applications on the same network
meeting the reliability requirements of applications, if any
Which three application layer protocols use TCP? (Choose three.)
TFTP
SMTP
SNMP
FTP
HTTP
SMTP
HTTP
FTP
Which flag in the TCP header is used in response to a received FIN in order to terminate connectivity between two network devices?
RST
ACK
SYN
FIN
ACK
Which two fields are included in the TCP header but not in the UDP header? (Choose two.)
sequence number
checksum
window
source port
destination port
sequence number
window
Which field in the TCP header indicates the status of the three-way handshake process?
control bits
reserved
window
checksum
control bits
What is a characteristic of UDP?
UDP only passes data to the network when the destination is ready to receive the data.
UDP datagrams take the same path and arrive in the correct order at the destination.
UDP reassembles the received datagrams in the order they were received.
Applications that use UDP are always considered unreliable.
UDP reassembles the received datagrams in the order they were received.
Which three statements characterize UDP? (Choose three.)
UDP is a low overhead protocol that does not provide sequencing or flow control mechanisms.
UDP provides connection-oriented, fast transport of data at Layer 3.
UDP relies on IP for error detection and recovery.
UDP relies on application layer protocols for error detection.
UDP provides basic connectionless transport layer functions.
UDP provides sophisticated flow control mechanisms.
UDP is a low overhead protocol that does not provide sequencing or flow control mechanisms.
UDP relies on application layer protocols for error detection.
UDP provides basic connectionless transport layer functions.
Which three fields are used in a UDP segment header? (Choose three.)
Checksum
Source Port
Acknowledgment Number
Length
Window Size
Sequence Number
Checksum
Source Port
Length
What kind of port must be requested from IANA in order to be used with a specific application?
registered port
source port
private port
dynamic port
registered port
Which two characteristics are associated with UDP sessions? (Choose two.)
Destination devices reassemble messages and pass them to an application.
Unacknowledged data packets are retransmitted.
Destination devices receive traffic with minimal delay.
Transmitted data segments are tracked.
Received data is unacknowledged.
Destination devices receive traffic with minimal delay.
Received data is unacknowledged.
How are port numbers used in the TCP/IP encapsulation process?
If multiple conversations occur that are using the same service, the source port number is used to track the separate conversations.
Destination port numbers are assigned automatically and cannot be changed.
Source port and destination port numbers are randomly generated.
Source port numbers and destination port numbers are not necessary when UDP is the transport layer protocol being used for the communication.
If multiple conversations occur that are using the same service, the source port number is used to track the separate conversations.
Why does HTTP use TCP as the transport layer protocol?
to ensure the fastest possible download speed
because transmission errors can be tolerated easily
because HTTP requires reliable delivery
because HTTP is a best-effort protocol
because HTTP requires reliable delivery
What does a client do when it has UDP datagrams to send?
It queries the server to see if it is ready to receive data.
It just sends the datagrams.
It sends to the server a segment with the SYN flag set to synchronize the conversation.
It sends a simplified three-way handshake to the server.
It just sends the datagrams.
A PC is downloading a large file from a server. The TCP window is 1000 bytes. The server is sending the file using 100-byte segments. How many segments will the server send before it requires an acknowledgment from the PC?
10 segments
1 segment
100 segments
1000 segments
10 segments
Which scenario describes a function provided by the transport layer?
A corporate worker is accessing a web server located on a corporate network. The transport layer formats the screen so the web page appears properly no matter what device is being used to view the web site.
A student has two web browser windows open in order to access two web sites. The transport layer ensures the correct web page is delivered to the correct browser window.
A student is using a classroom VoIP phone to call home. The unique identifier burned into the phone is a transport layer address used to contact another network device on the same network.
A student is playing a short web-based movie with sound. The movie and sound are encoded within the transport layer header.
A student has two web browser windows open in order to access two web sites. The transport layer ensures the correct web page is delivered to the correct browser window.
Which three layers of the OSI model provide similar network services to those provided by the application layer of the TCP/IP model? (Choose three.)
presentation layer
transport layer
session layer
physical layer
application layer
data link layer
presentation layer
session layer
application layer
A client creates a packet to send to a server. The client is requesting SNMP service. What number will be used as the destination port number in the sending packet?
443
80
110
161
161
What do the client/server and peer-to-peer network models have in common?
Both models require the use of TCP/IP-based protocols.
Both models support devices in server and client roles.
Both models have dedicated servers.
Both models are used only in the wired network environment.
Both models support devices in server and client roles
Which two protocols may devices use in the application process that sends email? (Choose two.)
DNS
HTTP
SMTP
POP3
POP
IMAP
SMTP
DNS
Which three protocols operate at the application layer of the TCP/IP model? (Choose three.)
UDP
TCP
ARP
POP3
DHCP
FTP
POP3
DHCP
FTP
Which protocol is used by a client to communicate securely with a web server?
SMB
HTTPS
IMAP
SMTP
HTTPS
The application layer of the TCP/IP model performs the functions of what three layers of the OSI model? (Choose three.)
session
presentation
transport
application
data link
physical
network
session
presentation
application
What is an example of network communication that uses the client-server model?
A user uses eMule to download a file that is shared by a friend after the file location is determined.
A workstation initiates an ARP to find the MAC address of a receiving host.
A user prints a document by using a printer that is attached to a workstation of a coworker.
A workstation initiates a DNS request when the user types www.cisco.com in the address bar of a web browser.
A workstation initiates a DNS request when the user types www.cisco.com in the address bar of a web browser.
