Lab 7 Report

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Northern Kentucky University *

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247

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Computer Science

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Feb 20, 2024

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[Jorge soto-lopez] [Lab Partner’s Name*] [MR.Roth] CIT 247 [date: 11/12/2023] CIT 247 Lab 7: OSPF Configuration Instructions: Please answer the questions below and include screenshots when requested. When you are finished, add your last name or NKU username to the beginning of this document’s filename. After this, upload this lab report alongside your GNS3 work to Canvas. *If you worked with a lab partner, please add his or her name after yours and separate the names with a semicolon. If not, simply delete the partner’s placeholder text. Questions: Q1.1: Why can you not configure the first address in a subnet (e.g., 192.168.1.0/24) to an interface or PC? Why is this also true for the last address (e.g., 192.168.1.255/24)? (Hint: What are these addresses used for? Refer to the subnetting module materials if needed.) In a subnet, the first address is the network address, used to identify the subnet itself, and cannot be assigned to a device. The last address is the broadcast address, used to send messages to all devices in the subnet, and cannot be assigned to a single device. Assigning these addresses to individual devices would disrupt network operations. Q1.2: Take a screenshot of the four ping tests and their results from Router1.

Q2.1: What interfaces did you make passive on the routers (Hint: Only routers need OSPF advertisements)? Why did you select these? Interfaces to Make Passive: Typically, the interfaces directly connected to PCs (e.g., f0/1 on each router, if that's the interface connected to the PCs). Reason for Selection: These interfaces are chosen because OSPF advertisements are unnecessary towards the PCs. OSPF is meant for router-to-router communication to exchange routing information, not for end devices like PCs. Q2.2: Provide a screenshot of Router1’s terminal after running the show ip protocol command. Q2.3: Provide a screenshot of the ping tests from PC-1 succeeding. Q3.1: What subnet mask did you select (please write it in CIDR format)? How many hosts does it support (not including the subnet ID or broadcast address)? Subnet Mask in CIDR Format: /28 (255.255.255.240)

Number of Hosts Supported: 16 Q3.2: With your new subnet mask, what is the 192.168.0.0 network’s subnet ID and broadcast address? Subnet ID: 192.168.0.0 Broadcast Address: 192.168.0.15 Q3.3: What are the first and last usable hosts of this subnet? First Usable Host: 192.168.0.1 Last Usable Host: 192.168.0.14 Q3.4: Provide one or more screenshots showing all three routers’ routing tables.

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