2.3.8 practice questions

pdf

School

Montgomery College *

*We aren’t endorsed by this school

Course

170

Subject

Computer Science

Date

Feb 20, 2024

Type

pdf

Pages

Uploaded by KidMoonKangaroo31

2/7/24, 8 : 17 PM Individual Response Page 1 of 12 about:srcdoc 2.3.8 Practice Questions Candidate: karlan fox (kfox21) Date: 2/7/2024, 8:10:24 PM • Time Spent: 08:29 Score: 60% Passing Score: 80% Question 1. Correct Which of the following is the process of breaking a message into packets, adding controls and other information, and then transmitting the message through the transmission medium? Sequencing Encapsulation Transformation Segmentation Explanation Encapsulation is the process of breaking a message into packets, adding controls and other information, and then transmitting the message through the transmission medium. The Transport layer adds sequencing and control information. The Internet layer converts the segments into packets. Data flows down through the layers of the OSI model on the sending system and is transformed at each layer. References 2.3.2 Data Encapsulation Facts q_data_encapsulation_01_np6.question.fex

2/7/24, 8 : 17 PM Individual Response Page 2 of 12 about:srcdoc Question 2. Correct What is the purpose of a frame check sequence (FCS) footer? Checksum error detection Contain logical network addresses Hold segment data Control information Explanation The Link layer converts packets into frames, adding physical device addressing information and a frame check sequence footer for error detection. It also converts the frames into bits (0s and 1s) for transmission across the transmission media. Control information is added at the Transport layer. The Transport layer breaks the data into pieces called segments. The Internet layer converts the segments into packets, adding logical network and device addresses. References 2.3.2 Data Encapsulation Facts q_data_encapsulation_fcs_np6.question.fex Question 3. Correct Which term does the OSI model use that's different from the TCP/IP model in reference to the terms frame, packet, and segment? Session

2/7/24, 8 : 17 PM Individual Response Page 3 of 12 about:srcdoc Presentation Protocol data unit (PDU) HTTP Explanation The OSI model uses the term protocol data unit (PDU) instead of the terms frame, packet, and segment. The Presentation and Session layers are Layers 5 and 6 of the OSI model, respectively, and do not correspond to the use of frame, packet, and segment in the TCP/IP model. HyperText Transfer Protocol (HTTP) is the protocol in the Application layer that supports web requests. References 2.3.1 Data Encapsulation 2.3.2 Data Encapsulation Facts 2.3.3 Address Resolution Protocol (ARP) 2.3.4 Packets and Frames 2.3.5 Network Communication Process Facts q_data_encapsulation_pdu_np6.question.fex Question 4. Incorrect Match each TCP/IP layers with its function. Breaks the data into pieces. Prepares the data to be sent.

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

2/7/24, 8 : 17 PM Individual Response Page 4 of 12 about:srcdoc Breaks the data into pieces. Link Transport Prepares the data to be sent. Transport Application Adds physical addresses. Internet Link Adds logical addresses. Application Internet Keyboard Instructions Explanation The Application layer prepares data to be sent through the network. The Transport layer breaks data into pieces called segments, adding sequencing and control information. The Internet layer converts segments into packets, adding logical network and device addresses. The Link layer converts packets into frames, adding physical device addressing information and a frame check sequence footer for error detection. It also converts the frames into bits (0s and 1s) for transmission across the transmission media. References 2.3.2 Data Encapsulation Facts q_data_encapsulation_tcpip_02_np6.question.fex Question 5. Incorrect Workstation2 needs to send data to Workstation3. Identify the Layer 2 and Layer 3 addresses Workstation2 will use to send the data by dragging the corresponding address from the list on the left to its location on the right.

2/7/24, 8 : 17 PM Individual Response Page 5 of 12 about:srcdoc from the list on the left to its location on the right. Layer 2 source address 080046987654 Layer 3 source address 000b5f2a5111 192.168.10.12 Layer 2 destination address 000b5f2a5111 000b5f2a2222 Layer 3 destination address 192.168.10.12 192.168.11.11

2/7/24, 8 : 17 PM Individual Response Page 6 of 12 about:srcdoc Keyboard Instructions Explanation Workstation2 will use the following addresses to send the data: The source Layer 2 address is its own MAC address, which is 080046987654. The source Layer 3 address is its own IP address, which is 192.168.10.12. The destination Layer 2 address is the MAC address of the default gateway router, which is 000b5f2a2222. The MAC address is the address of the interface connected to the same subnet as Workstation2. The destination Layer 3 address is the IP address of the destination device (Workstation3), which is 192.168.11.11. References 2.3.5 Network Communication Process Facts q_network_comm_address_01_np6.question.fex Question 6. Incorrect Workstation3 has started communicating with Workstation2. It sends a frame to the default gateway. Identify the Layer 2 and Layer 3 addresses used by the Cisco 2600 router to forward the data to Workstation2 by dragging the corresponding address from the list on the left to its location on the right.

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

2/7/24, 8 : 17 PM Individual Response Page 7 of 12 about:srcdoc Layer 2 source address 000b5f2a2222 Layer 3 source address 000b5f2a2222 192.168.11.11 Layer 2 destination address 000b5f2a2223 080046987654 Layer 3 destination address 192.168.10.12 Keyboard Instructions Explanation The Cisco 2600 router is the default gateway. When it receives a frame from Workstation3, it examines the Layer 3 address in the packet to locate the destination device. Then it creates a new frame and modifies the source and destination Layer 2 addresses (MAC addresses) as follows:

2/7/24, 8 : 17 PM Individual Response Page 8 of 12 about:srcdoc addresses) as follows: The source Layer 2 address is the gateway's own MAC address on the same segment as the destination device, which is 000b5f2a2222. The destination Layer 2 address is the MAC address of the destination device, which is 080046987654. The source and destination Layer 3 addresses (IP addresses) do not change. The source IP address is the IP address of Workstation3, which is 192.168.11.11. The destination IP address is the IP address of Workstation2, which is 192.168.10.12. References 2.3.5 Network Communication Process Facts q_network_comm_address_02_np6.question.fex Question 7. Incorrect When does a router use ARP? When the router's routing table doesn't contain the MAC addresses of devices on the local LAN that they need to forward frames to. If a router does not know a destination device's IP address, it sends an ARP broadcast containing the destination device's MAC address and requesting its IP address. If a router knows a destination host's MAC and IP address, it sends an ARP request to update the other routers' routing tables. ARP does not play any role in the routing process. Switches use ARP to map IP addresses to MAC addresses in collision domains.

2/7/24, 8 : 17 PM Individual Response Page 9 of 12 about:srcdoc to MAC addresses in collision domains. Explanation ARP (Address Resolution Protocol) resolves IP addresses into MAC addresses. Routers and other network devices use ARP when their routing tables don't contain the MAC addresses of devices on the local LAN that they need to forward frames to. References 2.3.3 Address Resolution Protocol (ARP) 2.3.5 Network Communication Process Facts 3.5.2 Network Adapter Facts 7.2.2 VLAN Facts q_network_comm_arp_01_np6.question.fex Question 8. Correct Routing data between computers on a network requires several mappings between different addresses. Which of the following statements is true? Routers use DNS to resolve MAC addresses of diskless workstations into IP addresses based on the information contained in other routers' routing tables. Hosts use ARP to resolve known IP addresses into MAC addresses. ICMP lets routers bypass the general network broadcast by providing a dynamic table of IP- to-MAC address mappings.

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

2/7/24, 8 : 17 PM Individual Response Page 10 of 12 about:srcdoc Diskless workstations use ARP to ask a server for an IP address. Explanation ARP lets hosts resolve known IP addresses into MAC addresses by broadcasting requests to the network. DNS is used to map hostnames to IP addresses. ARP is used to map IP addresses to MAC addresses. Diskless workstations use BOOTP to discover their IP address, the server's IP address, and the boot files they should use. ICMP notifies routers of problems on the network and undeliverable packets. References 2.3.3 Address Resolution Protocol (ARP) 2.3.5 Network Communication Process Facts 3.5.2 Network Adapter Facts 7.2.2 VLAN Facts q_network_comm_arp_02_np6.question.fex Question 9. Correct During network transmission, data is transferred to various routers, which forward the data to the appropriate network. If the source and destination network addresses reside on the same network, which protocol is used to determine the destination IP's MAC address? TCP HTTP GET

2/7/24, 8 : 17 PM Individual Response Page 11 of 12 about:srcdoc UDP ARP Explanation Address Resolution Protocol (ARP) is used to determine the host's MAC address using the destination IP address. An HTTP GET requests web page information from a web server. UDP and TCP are both Transport layer protocols. References 2.3.3 Address Resolution Protocol (ARP) 2.3.5 Network Communication Process Facts 3.5.2 Network Adapter Facts 7.2.2 VLAN Facts q_network_comm_arp_03_np6.question.fex Question 10. Correct TCP is a connection-oriented protocol that uses a three-way handshake to establish a connection to a system port. Computer 1 sends a SYN packet to Computer 2. Which packet does Computer 2 send back? ACK SYN/RST RST SYN/ACK

2/7/24, 8 : 17 PM Individual Response Page 12 of 12 about:srcdoc SYN/ACK Explanation If Computer 1 sends a SYN packet to Computer 2, Computer 2 receives the packet and sends a SYN/ACK packet to Computer 1. Computer 1 receives the SYN/ACK packet and replies back with an ACK packet, and the connection is complete. A SYN flag is used to start a connection between hosts. An ACK acknowledges the receipt of a packet. An RST resets a connection. References 2.3.2 Data Encapsulation Facts 2.3.3 Address Resolution Protocol (ARP) 2.3.6 Three-Way Handshake and TCP Flags 2.3.7 Three-Way Handshake and TCP Flags Facts q_tcp_flags_syn_ack_np6.question.fex Copyright © The Computing Technology Industry Association, Inc. All rights reserved.

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

2.3.8 practice questions

Related Documents