Exam: Protocols for Specific Tasks Flashcards
What type of applications are best suited for using UDP?
applications that are sensitive to delay
A PC user issues the netstat command without any options. What is displayed as the result of this command?
a list of all established active TCP connections
Refer to the exhibit. A TCP segment was sent by PC1 to the web server via port 80. Because of an unexpected network failure, the data was forwarded by R1 but was not received by R2. Which statement is correct about this scenario?
The web server will not acknowledge this segment. The PC1 timer will expire and PC1 will resend the segment.
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
A destination PC receives an email message with the sequence numbers on packets out of order. Which layer of the TCP/IP model is responsible for reassembling the packets of the message in the correct order?
transport
What information is used by TCP to reassemble and reorder received segments?
sequence numbers
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 selects a source port number.
“Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.
What message is displayed on the webpage?”
A secure web server is the way to go!
“Open the PT Activity. Perform the tasks in the activity instructions and then answer the question or complete the task.
Capture traffic in simulation mode. What application layer service is PC-A requesting from the web server?”
FTP
Which number or set of numbers represents a socket?
192.168.1.1:80
A new employee is attempting to configure a cell phone to connect to the email server of the company. Which port number should be selected when using the IMAP4 protocol to access email messages stored on the local server?
143
“Open the PT activity. Perform the tasks in the activity instructions and then answer the question.
What is the application layer service being requested from Server0 by PC0?”
HTTPS
While a network security product is being deployed, a customizable list of allowable protocols is shown. Which three protocols should be allowed to provide for the use of email on a network? (Choose three.)
POP3, IMAP, & SMTP
A computer has been assigned an IP address of 169.254.33.16. What command initiates the process of requesting a new IP address?
ipconfig /release
What is a function of the tracert command that differs from the ping command when they are used on a workstation?
The tracert command shows the information of routers in the path.
Which statement describes the use of the ping command?
The ping command tests end-to-end connectivity between two devices.
A technician is troubleshooting a network where it is suspected that a defective node in the network path is causing packets to be dropped. The technician only has the IP address of the end point device and does not have any details of the intermediate devices. What command can the technician use to identify the faulty node?
tracert
Which command line utility is used to test connectivity to other IP hosts?
ping
A user is able to ping www.cisco.com by its IP address but cannot browse to www.cisco.com in a browser. What is the possible cause?
The DNS server is not working.
A user needs to find the MAC address on the host PC. Which command line utility can be used to display this information?
ipconfig /all
Which command line utility is used to display active network connections on a PC?
netstat
Which command is used to test network connectivity and provide a response to each packet received by the remote host?
Ping
ipconfig
Displays IP configuration information
ping
Tests connections to other IP hosts
netstat
Displays network connections
tracert
Displays the route taken to the destination
nslookup
Directly queries the name server for information on a destination domain
ipconfig /all
displays additional information including the MAC address, IP addresses of the default gateway, and the DNS servers.
ipconfig /release
release the current DHCP bindings
ipconfig /renew
will request fresh configuration information from the DHCP server
What two characteristics describe an FTP connection? (Choose two.)
Files can be downloaded from or uploaded to the server & The first connection established is for traffic control and the second connection is created to transfer a file
Which two applications provide virtual terminal access to remote servers?
SSH & Telnet
Which layer of the TCP/IP model is responsible for ensuring packets are sent reliably and any missing packets are resent?
transport layer
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
Which protocol operates at the application layer of the TCP/IP model?
HTTP
A student is sending files from a phone to a computer across a network. Which layer of the TCP/IP model is responsible for reassembling these messages as they are received on the computer?
transport
What is the purpose of using a source port number in a TCP communication?
to keep track of multiple conversations between devices
