Day 5 - Net +

b. Reassigning port numbers

1. There are two primary functions specified by all Transport layer protocols. Which of the following is NOT one of them? a. Conversation Multiplexing b. Reassigning port numbers c. Conversation Multiplexing

B. netstat

1. Which command can generate the following output? Active Connections Proto Local Address Foreign Address State TCP COMPUTER1:1085 172.30.0.5:3389 ESTABLISHED TCP COMPUTER1:1089 172.30.0.5:80 TIME_WAIT A. nslookup B. netstat C. ipconfig D. ping

TCP

10. Does TCP or UDP retransmit data if it does not receive a response in a specified amount of time?

D. UDP

10. Which protocol is included in the TCP/IP protocol suite? A. SPX B. IPX C. NetBEUI D. UDP

11. Place the 4 steps of TCP Session Termination in the correct order from 1-4 (one being first and four being last) __3___ The client sends a FIN to the server to terminate the client to server session. __2___ The client sends an ACK to acknowledge the receipt of the FIN to terminate the session from server to client. ___4__ The server responds with an ACK to acknowledge the FIN from the client. __1___ When the server has no more data to send in the stream, it sends a segment with the FIN flag set.

11. Place the 4 steps of TCP Session Termination in the correct order from 1-4 (one being first and four being last) _____ The client sends a FIN to the server to terminate the client to server session. _____ The client sends an ACK to acknowledge the receipt of the FIN to terminate the session from server to client. _____ The server responds with an ACK to acknowledge the FIN from the client. _____ When the server has no more data to send in the stream, it sends a segment with the FIN flag set.

A. Transport

11. Which layer of the OSI model can provide reliable communication? A. Transport B. Data Link C. Network D. Session

sequence acknowledgement

12. The segment (s)____________________ number and (a)____________________ number are used to confirm receipt of the bytes of data in the segments.

C. TFTP

12. Which protocol uses UDP ports for transfers? A. RIPv2 B. HTTPS C. TFTP D. HTTP

flow control

13. What is the term that describes data moving back and forth properly between two services? (f)___________________ (c)____________________

D. SNMP

13. Which protocol is used to monitor network managed equipment? A. SMB B. SMTP C. LDAP D. SNMP

C. Transport

14. Which layer in the OSI model is included in the TCP/IP model? A. Physical B. Data Link C. Transport D. Application

DNS, HTTP,HTTPS, IMAC, SMTP, TELNET, FTP

15. What are three protocols that use TCP?

A. Less Overhead - Faster Performance

15. What is the advantage of UDP over TCP? A. Less Overhead - Faster Performance B. Older - Larger pool of compatible hardware C. TCP is not IPv6 compatible UDP is D. UDP can operate at Layer 1

POP3, DHCP, DNS

16. What are three protocols that use UDP?

B. netstat

16. What command do you use to display active TCP or UDP connections? A. ping B. netstat C. ipconfig D. nslookup

NETSTAT

17. What is the command line tool that displays network connections for TCP, routing tables, and a number of network interfaces?

D. 53

17. What port does DNS use? A. 443 B. 389 C. 51 D. 53

WIRESHARK PROTOCOL ANALYZER

18. What are 2 popular and free software that assists network administrators in analyzing and monitoring traffic?

B. 67

18. Which of these ports does DHCP use? A. 80 B. 67 C. 23 D. 500

B. netstat

19. What command do you use to display active TCP or UDP connections? A. ping B. netstat C. ipconfig D. nslookup

67/68 UDP

19. What is the ports and protocol type of DHCP?

b. Each segment has 8 bytes inside it called datagrams

2. Which of the following is NOT true of TCP? a. It is connection oriented b. Each segment has 8 bytes inside it called datagrams c. Reliable but slower than UDP d. Utilizes order delivery, flow control, and and reliable delivery

C. TCP

2. Which of the following is a connection-oriented protocol? A. IP B. UDP C. TCP D. SPX

A. netstat -e

20. What command displays Ethernet statistics? A. netstat -e B. netstat -x C. netstat -q D. netstat -t

20/21 TCP

20. What is the ports and protocol type of FTP?

B. UDP

3. Select the protocol that is a connectionless protocol that doesn't use acknowledgements? A. NTP B. UDP C. TCP D. POP3

a. Each segment is broken down into 20 bytes

3. Which of the following is NOT true of UDP a. Each segment is broken down into 20 bytes b. It is a connectionless protocol c. It is faster but less reliable than TCP d. Each segment is known as a datagram

true

4. True or False: Each header sent out by TCP and UDP contain both a source and destination port.

C. TCP is connection-oriented, UDP is unreliable

4. Which of the following statements is correct, with regards to TCP and UDP. A. TCP is connection-oriented, UDP is reliable. B. TCP is connectionless, UDP is unreliable. C. TCP is connection-oriented, UDP is unreliable. D. TCP is connectionless, UDP is reliable.

c. socket pair

5. A combination of the Transport layer port number and the Network layer IP address is known as a. twisted pair b. protocol c. socket pair d. multiplexing

C. netstat

5. A custom application deployed on the network uses TCP port 8090. Users on the network are complaining about not being able to access the custom application. Which command can verify that the server is still receiving connections on TCP port 8090? A. ipconfig B. telnet C. netstat D. nslookup

false

6. True or False: Servers tend to not have predefined ports and assign each protocol it receives to a port number at the time of arrival.

C. SYN-ACK

6. Your company has just installed a packet sniffer on the network. The sniffer discovers that client A is sending TCP SYN packets to server B. What packet will server B return? A. ACK B. NAK C. SYN-ACK D. SYN-NAK

dynamic/private well known registered

7. Three types of IANA port assignments are well known ports, registered ports, and dynamic/private ports. Which type of port goes with which numbers below? a. 49152-65535: ___________________ b. 0-1023: ________________________ c. 1024-49151: ____________________

C. UDP

7. Which protocol belongs to the OSI transport layer and has the best-effort delivery method? A. TCP B. HTTP C. UDP D. FTP

B. The Internet

8. After configuring a firewall to prevent all UDP traffic, which item below will fail to function? A. A network printer B. The Internet C. A VoIP device D. A server database application

TCP

8. Does TCP or UDP have sequence numbers in their headers to allow the data to be reassembled properly?

3

9. The reliability of TCP is performed using a _________ (two, three, four) way handshake.

B. Video conferencing

9. Which of the following uses the UDP protocol? A. Uploading files to an FTP server B. Video conferencing C. Downloading a webpage D. Sending an e-mail