CCNA 1 Chapter v5.1 Answers 100%

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1 CCNA 1 Chapter v5.1 Answers 100% 1. Which tw characteristics are assciated with UDP sessins? (Chse tw.) Destinatin devices receive traffic with minimal delay. Transmitted data segments are tracked. Destinatin devices reassemble messages and pass them t an applicatin. Received data is unacknwledged. Unacknwledged data packets are retransmitted. 2. What happens if part f an FTP message is nt delivered t the destinatin? The message is lst because FTP des nt use a reliable delivery methd. The FTP surce hst sends a query t the destinatin hst. The part f the FTP message that was lst is re-sent. The entire FTP message is re-sent. 3. A hst device needs t send a large vide file acrss the netwrk while prviding data cmmunicatin t ther users. Which feature will allw different cmmunicatin streams t ccur at the same time, withut having a single data stream using all available bandwidth? windw size multiplexing prt numbers acknwledgments 4. What kind f prt must be requested frm IANA in rder t be used with a specific applicatin? registered prt private prt dynamic prt surce prt 5. What type f infrmatin is included in the transprt header? destinatin and surce lgical addresses destinatin and surce physical addresses destinatin and surce prt numbers encded applicatin data 6. What is a scket? the cmbinatin f the surce and destinatin IP address and surce and destinatin Ethernet address the cmbinatin f a surce IP address and prt number r a destinatin IP address and prt number CCNA 5 Page 1

2 the cmbinatin f the surce and destinatin sequence and acknwledgment numbers the cmbinatin f the surce and destinatin sequence numbers and prt numbers 7. What is the cmplete range f TCP and UDP well-knwn prts? 0 t t Which flag in the TCP header is used in respnse t a received FIN in rder t terminate cnnectivity between tw netwrk devices? FIN ACK SYN RST 9. What is a characteristic f a TCP server prcess? Every applicatin prcess running n the server has t be cnfigured t use a dynamic prt number. There can be many prts pen simultaneusly n a server, ne fr each active server applicatin. An individual server can have tw services assigned t the same prt number within the same transprt layer services. A hst running tw different applicatins can have bth cnfigured t use the same server prt. 10. Which tw flags in the TCP header are used in a TCP three-way handshake t establish cnnectivity between tw netwrk devices? (Chse tw.) ACK FIN PSH RST SYN URG 11. A PC is dwnlading a large file frm a server. The TCP windw is 1000 bytes. The server is sending the file using 100-byte segments. Hw many segments will the server send befre it requires an acknwledgment frm the PC? 1 segment 10 segments 100 segments 1000 segments CCNA 5 Page 2

3 12. Which factr determines TCP windw size? the amunt f data t be transmitted the number f services included in the TCP segment the amunt f data the destinatin can prcess at ne time the amunt f data the surce is capable f sending at ne time 13. During a TCP sessin, a destinatin device sends an acknwledgment number t the surce device. What des the acknwledgment number represent? the ttal number f bytes that have been received ne number mre than the sequence number the next byte that the destinatin expects t receive the last sequence number that was sent by the surce 14. What infrmatin is used by TCP t reassemble and rerder received segments? prt numbers sequence numbers acknwledgment numbers fragment numbers 15. What des TCP d if the sending surce detects netwrk cngestin n the path t the destinatin? The surce hst will send a request fr mre frequent acknwledgments t the destinatin. The surce will decrease the amunt f data that it sends befre it must receive acknwledgements frm the destinatin. The destinatin will request retransmissin f the entire message. The surce will acknwledge the last segment that is sent and include a request fr a smaller windw size in the message. 16. What is a characteristic f UDP? UDP datagrams take the same path and arrive in the crrect rder at the destinatin. Applicatins that use UDP are always cnsidered unreliable. UDP reassembles the received datagrams in the rder they were received. UDP nly passes data t the netwrk when the destinatin is ready t receive the data. 17. What des a client d when it has UDP datagrams t send? It just sends the datagrams. It queries the server t see if it is ready t receive data. It sends a simplified three-way handshake t the server. It sends t the server a segment with the SYN flag set t synchrnize the cnversatin. CCNA 5 Page 3

4 18. What happens if the first packet f a TFTP transfer is lst? The client will wait indefinitely fr the reply. The TFTP applicatin will retry the request if a reply is nt received. The next-hp ruter r the default gateway will prvide a reply with an errr cde. The transprt layer will retry the query if a reply is nt received. 19. A hst device is receiving live streaming vide. Hw des the device accunt fr vide data that is lst during transmissin? The device will immediately request a retransmissin f the missing data. The device will use sequence numbers t pause the vide stream until the crrect data arrives. The device will delay the streaming vide until the entire vide stream is received. The device will cntinue receiving the streaming vide, but there may be a mmentary disruptin. 20. Why des HTTP use TCP as the transprt layer prtcl? t ensure the fastest pssible dwnlad speed because HTTP is a best-effrt prtcl because transmissin errrs can be tlerated easily because HTTP requires reliable delivery 21. When is UDP preferred t TCP? when a client sends a segment t a server when all the data must be fully received befre any part f it is cnsidered useful when an applicatin can tlerate sme lss f data during transmissin when segments must arrive in a very specific sequence t be prcessed successfully 22. Which three applicatin layer prtcls use TCP? (Chse three.) SMTP FTP SNMP HTTP TFTP DHCP 23. Refer t the exhibit. Cnsider a datagram that riginates n the PC and that is destined fr the web server. Match the IP addresses and prt numbers that are in that datagram t the descriptin. (Nt all ptins are used.) CCNA 5 Page 4

5 CCNA1 Chapter 9 v Questin CCNA1 Chapter 9 v Questin Answer CCNA1 Chapter 9 v Answer CCNA 5 Page 5

Transmission Control Protocol Introduction

Transmission Control Protocol Introduction Transmissin Cntrl Prtcl Intrductin TCP is ne f the mst imprtant prtcls f Internet Prtcls suite. It is mst widely used prtcl fr data transmissin in cmmunicatin netwrk such as Internet. Features TCP is reliable