module 11 Transport layer services Flashcards
Which layer of the TCP/IP model is responsible for ensuring packets are sent reliably and any missing packets are resent?
Transport layer
True or False: The Transport Control Protocol (TCP) does not keep track of segments sent to the destination.
False
True or False: The User Datagram Protocol (UDP) does not use acknowledgments to track the receipt of segments.
True
Assume a host with IP address 10.1.1.10 wants to request web services from a server at 10.1.1.254. Which of the following would display the correct socket pair?
10.1.1.10(:1099) - 10.1.1.254(:80)
Which port group includes port numbers for FTP, HTTP, and TFTP applications?
Well-known ports
Which Windows command would display the protocols in use, the local address and port numbers, the foreign address and port numbers, and the connection state?
Netstat
A client packet is received by a server. The packet has a destination port number of 21. What service is the client requesting?
FTP
A client packet is received by a server. The packet has a destination port number of 22. What service is the client requesting?
SSh
A client packet is received by a server. The packet has a destination port number of 67. What service is the client requesting?
DHCP
A client packet is received by a server. The packet has a destination port number of 53. What service is the client requesting?
DNS
A client packet is received by a server. The packet has a destination port number of 161. What service is the client requesting?
snmp
A client packet is received by a server. The packet has a destination port number of 443. What service is the client requesting?
HTTPS
A client packet is received by a server. The packet has a destination port number of 143. What service is the client requesting?
IMAP
A client packet is received by a server. The packet has a destination port number of 110. What service is the client requesting?
POP3
A client packet is received by a server. The packet has a destination port number of 69. What service is the client requesting?
TFTP
A client packet is received by a server. The packet has a destination port number of 25. What service is the client requesting?
SMTP
A client packet is received by a server. The packet has a destination port number of 110. What service is the client requesting?
pop3
Why is UDP well suited as the transport layer protocol for video applications?
UDP has low Overhead
Which transport layer information is added to both the TCP and UDP headers?
Port number
What type of applications are best suited for using UDP?
application that are sensitive to delay
What protocol header information is used at the transport layer to identify a target application?
Port Number
A client device has initiated a secure HTTP request to a web browser. Which well-known port address number is associated with the destination address?
443
What information is used by TCP to reassemble and reorder received segments?
Sequence Numbers
What type of port number is assigned by IANA to commonly used services and applications?
Well-known port
Which protocol operates at the transport layer of the TCP/IP model and ensures reliable delivery of IP packets?
TCP
What is a characteristic of UDP?
it provide unreliable delivery of segment
What is the well-known port address number used by DNS to serve requests?
53
which action is performed by a client when establishing communication with a server via the use of UDP at the transport layer?
the client randomly select a source port number
