2QTR_12CSS_Mod3-NETWORK-TOPOLOGY (3) PDF

12 Quarter 2 Module 3 NETWORK TOPOLOGY Republic Act 8293, section 176 states that: No copyright shall subsist in any work of the Government of the Philippines. However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of...

12 Quarter 2 Module 3 NETWORK TOPOLOGY Republic Act 8293, section 176 states that: No copyright shall subsist in any work of the Government of the Philippines. However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties. Borrowed materials (i.e., pictures, photos, brand names, trademarks, etc.) included in this module are owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them. Published by the Department of Education Secretary: Leonor Magtolis Briones Undersecretary: Diosdado M. San Antonio INTRODUCTORY MESSAGE Welcome to the TECHNICAL VOCATIONAL LIVELIHOOD 12 Alternative Delivery Mode (ADM) Module on (CSS) COMPUTER SYSTEMS SERVICING NC II. This module was designed and developed to assist, in helping the learners meet the standards set by the K to 12 Curriculum while overcoming their personal, social, and economic constraints in schooling. This learning resource hopes to engage the learners into guided and independent learning activities at their own pace and time. Furthermore, this also aims to help learners acquire the needed 21st century skills while taking into consideration their needs and circumstances. In addition to the material in the main text, you will also see this box in the body of the module: For the learner: Welcome to the TECHNICAL VOCATIONAL LIVELIHOOD 12 Alternative Delivery Mode (ADM) Module on (CSS) COMPUTER SYSTEMS SERVICING NC II. The hand is one of the most symbolized part of the human body. It is often used to depict skill, action and purpose. Through our hands we may learn, create and accomplish. Hence, the hand in this learning resource signifies that you as a learner is capable and empowered to successfully achieve the relevant competencies and skills at your own pace and time. Your academic success lies in your own hands! This module was designed to provide you with fun and meaningful opportunities for guided and independent learning at your own pace and time. You will be enabled to process the contents of the learning resource while being an active learner. The following are some reminders in using this module: 1. Use the module with care. Do not put unnecessary mark/s on any part of the module. Use a separate sheet of paper in answering the exercises. 2. Do not forget to answer What I Know before moving on to the other activities included in the module. 3. Read the instruction carefully before doing each task. 4. Observe honesty and integrity in doing the tasks and checking your answers.  5. Finish the task at hand before proceeding to the next. 6. Return this module to your teacher/facilitator once you are through with it. If you encounter any difficulty in answering the tasks in this module, do not hesitate to consult your teacher or facilitator. Always bear in mind that you are not alone. We hope that through this material, you will experience meaningful learning and gain deep understanding of the relevant competencies. You can do it!  What I Need to Know INTRODUCTION / LEARNING OBJECTIVES In this module you will learn what is a network and the different types of network topology. You will learn also the difference of between Logical and physical topology. Logical topology is how devices appear connected to the user. And a physical topology is how they are interconnected with the wires and cables. [ What I Know Now, to start with this module, let us dig deeper into your prior knowledge and previous experiences about computer systems servicing. Direction: Read the statement carefully and identify what is being described or defined. Choose your answer from the words inside the word bank. Write your answers in a separate sheet of paper. WORD BANK Logical topology Physical topology Bus topology Ring Topology Star Topology Tree Topology Mesh topology 1. This is how they are interconnected with wires and cables. 2. Every device has exactly two neighbors for communication purposes. 3. This is how devices appear connected to the user. 4. A topology that features a central connection point called a "hub node" that may be a network hub, switch, or router. 5. This topology introduces the concept of routes.  What’s New Multiple Choice Direction: Select the best answer for each question. Write the letter and words of your answer on a separate sheet of paper. ____ 1. Which of the following topology use a common backbone to connect all devices? A.) Star topology C.) Bus Topology B.) Ring topology D.) None of these ____ 2. This type of topology joins multiple star topologies together. A.) Star topology C.) Bus Topology B.) Ring topology D.) None of these ____ 3. Which of the following refers to how they are interconnected with wires and cables? A.) Star topology C.) Physical Topology B.) Ring topology D.) Logical Topology ____ 4. What type of topology below refers to joining multiple star topologies together onto a bus? A.) Star topology C.) Bus Topology B.) Ring topology D.) Tree Topology ____ 5. What type of topology that can take down the entire network if a failure in any cable or device breaks? A.) Star topology C.) Bus Topology B.) Ring topology D.) Tree Topology  What is It NETWORK TOPOLOGY LEARNING OBJECTIVE After reading this information sheet, student(s) must be able to explain and discuss the different types of network topology. NETWORK TOPOLOGIES A logical topology is how devices appear connected to the user. A physical topology is how they are interconnected with wires and cables. For example, in a shared Ethernet network that uses hubs rather than switches, the logical topology appears as if every node is connected to a common bus that runs from node to node. However, its physical topology is a star, in which every node on the network connects to a central hub. Think of a topology as a network's virtual shape or structure. This shape does not necessarily correspond to the actual physical layout of the devices on the network. For example, the computers on a home network may be arranged in a circle in a family room, but it would be highly unlikely to find a ring topology there. https://www.golurn.com/COC2_LO2/content/assets/sQRtUrWTWCE1eCD6_transcoded- zqP-YS_X54FuoGPC-Network%20Topologies.mp4 BUS TOPOLOGY Bus networks (not to be confused with the system bus of a computer) use a common backbone to connect all devices. A single cable, the backbone functions as a shared communication medium that devices attach or tap into with an interface connector. A device wanting to communicate with another device on the network sends a broadcast message onto the wire that all other devices see, but only the intended recipient actually accepts and processes the message. Ethernet bus topologies are relatively easy to install and don't require much cabling compared to the alternatives. 10Base-2 ("ThinNet") and 10Base-5 ("ThickNet") both were popular Ethernet cabling options many years ago for bus topologies. However, bus networks work best with a limited number of devices. If more than a few dozen computers are added to a network bus, performance problems will likely result. In addition, if the backbone cable fails, the entire network effectively becomes unusable. RING TOPOLOGY In a ring network, every device has exactly two neighbors for communication purposes.  All messages travel through a ring in the same direction (either "clockwise" or "counterclockwise"). A failure in any cable or device breaks the loop and can take down the entire network. To implement a ring network, one typically uses FDDI, SONET, or Token Ring technology. Ring topologies are found in some office buildings or school campuses. STAR TOPOLOGY Many home networks use the star topology. A star network features a central connection point called a "hub node" that may be a network hub, switch or router. Devices typically connect to the hub with Unshielded Twisted Pair (UTP) Ethernet.  Figure 1.3 Star Topology Compared to the bus topology, a star network generally requires more cable, but a failure in any star network cable will only take down one computer's network access and not the entire LAN. (If the hub/switch fails, however, the entire network also fails.) TREE TOPOLOGY A tree topology joins multiple star topologies together onto a bus. In its simplest form, only hub devices connect directly to the tree bus, and each hub functions as the root of a tree of devices. This bus/star hybrid approach supports future expansion of the network much better than a bus (limited in the number of devices due to the broadcast traffic it generates) or a star (limited by the number of hub connection points) alone. MESH TOPOLOGY Mesh topology introduces the concept of routes. Unlike each of the previous topologies, messages sent on a mesh network can take any of several possible paths from source to destination. (Recall that even in a ring, although two cable paths exist, messages can only travel in one direction.) Some WANs, most notably the Internet, employ mesh routing. A mesh network in which every device connects to every other is called a full mesh. SUMMARY Topology remains an important part of network design theory. You can probably build a home or small business computer network without understanding the difference between a bus design and a star design but becoming familiar with the standard topologies gives you a better understanding of important networking concepts like hubs, broadcasts, and routes. What’s More TERMS AND DEFINITIONS Logical topology is how devices appear connected to the user. Physical topology is how they are (actually) interconnected with wires and cables. Bus networks (not to be confused with the system bus of a computer) use a common backbone to connect all devices. Ring Topology- In a ring network, every device has exactly two neighbors for communication purposes. Star Topology -Many home networks use the star topology. A star network features a central connection point called a "hub node" that may be a network hub, switch, or router. Tree topology joins multiple star topologies together onto a bus. Mesh topology introduces the concept of routes.  Assessment Multiple Choice Direction: Read each line and select the best answer for each question. Write the letter and words of your answer on a separate sheet of paper. ____ 1. Topology that introduces the concept of routes. A.) Ring Topology C.) Tree Topology B.) Mesh Topology D.) Star Topology ____ 2. Topology joins multiple star topologies together onto a bus. A.) Mesh Topology C.) Ring Topology B.) Star Topology D.) Tree Topology ____ 3. Features a central connection point called a "hub node" that may be a network hub, switch or router. A.) Star topology C.) Ring Topology B.) Tree Topology D.) Mesh Topology ____ 4. Every device has exactly two neighbors for communication purposes. A.) Mesh Topology C.) Ring Topology B.) Star Topology D.) Tree Topology ____ 5. Uses a common backbone to connect all devices. A.) Internet C.) Bus network B.) Ethernet D.) Topologies Write True if the statement is correct and False it is false. (No. x 1) 1. Ring topologies are found in some office buildings or school campuses. 2. Ethernet bus topologies are relatively easy to install and do not require much cabling compared to the alternatives. 3. If the backbone cable fails, the entire network effectively becomes usable.  4. Only hub devices connect directly to the tree bus, and each hub functions as the root of a tree of devices. 5. Devices typically connect to the hub with Unshielded Twisted Pair (UTP) Ethernet. REFERENCE BALANA I.M., Patch Panel, viewed 2 November 2020 https://www.golurn.com/COC2_LO2/content/#/lessons/tbxPPIxZvQHtv0ngOYcx1ydt qjJrx-WP