Chapters 1-5 Exam 1

When PC1 on an Ethernet network sends a packet to a remote PC2 that is on another Ethernet network, and the packet is routed by exactly two routers, connected by an HDLC WAN connection, how many different Layer 2 headers (with different addresses in the headers) will be created to encapsulate the IP packet as it travels from PC1 to PC2? A. 2 B. 1 C. 3 D. None. HDLC doesn't use Ethernet headers. E. 4

3

🖲-----🖲 Campus 1 router connects to Campus 2 router. Each router is required to provide 500mbps of bandwidth 3000 meter range Which standard of Ethernet should be used in this situation ?

802.3z

Which options correctly list the addresses covered by the indicated address class? Type A, B, C or D A. Class B—addresses beginning with 128-191, inclusive B. Class C—addresses beginning with 192-223, inclusive C. Class B—addresses beginning with 128-192, inclusive D. Class C—addresses beginning with 172-212, inclusive

A. B.

Which of the following are examples of common Internet access links? Select 3 answers Type A, B, C, D or E A. Leased line B. PPP C. HDLC D. DSL E. Cable

A. D. E.

Which of the following are not characteristics of UDP? A. UDP is used with TFTP. B. UDP is unreliable. C. UDP is connection-oriented. D. UDP is connectionless. E. UDP is at the Transport layer. F. UDP uses no acknowledgments.

UDP is connection-oriented.

The network in the figure uses CAT5 cabling with RJ-45 connectors. Which of the following statements are true about the wires inside the cable and the RJ-45 pins to which they are connected? 🖥↔️🕹↔️🖲↔️🖥 ~~~~~~↕️ 🖥↔️🕹 Select 3 answers Type A, B, C, D, E or F A. The cable from PC1 to SW1 connects pin 1 on one end to pin 1 on the other end. B. The cable from SW2 to R1 connects pin 1 on one end to pin 3 on the other end. C. The cable from PC1 to SW1 connects pin 1 on one end to pin 3 on the other end. D. The cable from SW1 to SW2 connects pin 1 on one end to pin 1 on the other end E. The cable from SW2 to R1 connects pin 2 on one end to pin 2 on the other end. F. The cable from SW1 to SW2 connects pin 1 on one end to pin 3 on the other end.

A. E. F.

Which protocol finds an unknown Layer 2 address from a known IP address? A. DNS B. ICMP C. ARP D. DHCP

ARP

A user sits at her PC at her desk inside an Enterprise network. She opens a web browser and connects to a website that sits on the Internet. Which of the following answers is most true about the applications and functions used as a result of this user's actions? Type A, B, C or D A. UDP is used as part of the process of transferring files from the web server to the user's web browser. B. The user's PC sends at least two messages to the server before requesting the specific web page. C. The transfer of files uses the FTP protocol. D. UDP is used as part of the process of resolving the website's name into the default gateway's MAC address.

B.

What is the correct sequence for TCP connection establishment? Type A, B, C or D A. There is no sequence because TCP is a connectionless protocol. B. (1) SYN (2) SYN ACK (3) ACK C. (1) ACK (2) SYN ACK (3) SYN D. (1) SYN (2) ACK (3) SYN

B.

A user in an Enterprise network sits at her PC and connects to a web server inside the Enterprise by entering the URL http://www.example.com/payroll.html into the browser's window and pressing Enter. Which of the following answers are true about the actions taken by the user's PC? Type two answers Type A, B, C or D A. If any packets sent by the server are lost in transit, HTTP causes the server to resend the lost data. B. All the text after the // in the URI (in the question) is considered to be the server's hostname and is used in the DNS request to find the server's IP address. C. The PC uses Hypertext Transfer Protocol (HTTP) to get the files that comprise the requested web page. D. The user's action of entering the URI and pressing Enter may result in multiple HTTP get requests being made to the server.

C, D

How does the receiver of an HDLC frame know what has been encapsulated within that frame? Type A, B, C or D A. Based on the Flag field B. Based on the FCS field C. The Type field in the header D. HDLC only encapsulates IPv4 E. From the IP address (IPv4, IPv6, and so on)

C.

All IP addresses that begin with 186.72 would be considered part of which address class? A. Class C B. Class D C. Class B D. Class A

Class B

Assume a TCP connection already exists between PC1 and PC2. Which TCP message packet would be the final one to be sent between devices if both approve the connection termination? Type A, B, C or D A. TCP-SYN, FIN B. TCP-FIN,ACK C. TCP-FIN D. TCP-ACK

D.

What is the purpose of the FCS field in a HDLC frame A. Used to indicate to the previous receiving device that a new frame is arriving. B. Used for identifying the type of L3 payload carried in frame C. Specifies Dest IP Address for frame D. Indent the dest L2 Address for frame E. Error detection

Error detection

Which of the following describe a MAC address? A. Layer 3 address B. 128 bits C. Layer 2 address D. Layer 1 address E. 32 bits F. 48 bits

Layer 2 address, 48 bits

IP functions at what layer of the OSI Reference Model? A. Session B. Physical C. Transport D. Network

Network

Which layer of the OSI Reference Model defines end-to-end delivery of packets? A. The Ozone layer B. The Network layer C. The Link layer D. The Transport layer E. The Session layer

Network layer