Networks Keywords Network Hardware

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Presentation transcript:

Networks Keywords Network Hardware LAN, Packet, Wireless access point (WAP), Router, Switch, Network interface card (NIC), Transmission media, Network performance Networks Network Hardware

Video Objectives BEGINNER: Identify the components required to create a LAN. ADVANCED: Describe the role of each component in a LAN. EXPERT: Understand what is meant by the performance of a network and explain the factors that can affect the performance of a network. Starter activity

Packet Questions Objectives BEGINNER: Identify the components required to create a LAN. ADVANCED: Describe the role of each component in a LAN. EXPERT: Understand what is meant by the performance of a network and explain the factors that can affect the performance of a network. 1. What do we mean by a packets of data? 2. Why do we need to create packets of data? 3. What might happen if we did not have the correct hardware to guide the passage of the packets of data? Data transmitted over a network is broken down into packets. Each packet contains the address of the sender and the address of the receiver (IP addresses) Packets will also contain a sequence number Packets will have a time to live (how many hops around the network they can take before they disappear. Starter activity

What is the role of these components? Objectives BEGINNER: Identify the components required to create a LAN. ADVANCED: Describe the role of each component in a LAN. EXPERT: Understand what is meant by the performance of a network and explain the factors that can affect the performance of a network. Wireless Access Point Allows for wireless devices to connect to a network (either LAN or WAN) Includes connections through Wifi and Bluetooth WAPs provide Internet access in public places (often known as Wi-Fi hotspots) Network Interface Card A network interface card allows a computer to connect to a wired network A NIC allows data packets to travel to and from a computer A NIC contains a MAC address which is a physical hardware address A NIC allows an Ethernet cable to be plugged into this Starter activity Transmission Media Ethernet (Cat 5e / Cat6) Known as twisted pair A networking standard Fibre optic Very fast cable but also more expensive (often used with WAN or larger LANs) Coaxial Cable An older networking standard

What is the role of these components? Objectives BEGINNER: Identify the components required to create a LAN. ADVANCED: Describe the role of each component in a LAN. EXPERT: Understand what is meant by the performance of a network and explain the factors that can affect the performance of a network. Router An interconnection device used on networks to connect two or more devices. Routers contain a routing table which has a list of IP addresses and common routes for packets to take Routers examine packets IP addresses The router will apply a subnet mask to identify a network and determine which network the packet should be forwarded to If the packet is for this network – the router determines which host to send the packet to Routers allow packets from different network types to be exchanged. Switch If two or more computers place a packet onto a network at the same time – a data collision occurs A switch is an interconnection device that connects two or more devices together and helps in solving the issue of data collisions As a data packet arrives at the switch – its destination address is examined and the switch creates a direct connection to that device As far as the two devices are concerned there are no other computers on the network. Starter activity

Task Complete the Network Hardware Worksheet Objectives BEGINNER: Identify the components required to create a LAN. ADVANCED: Describe the role of each component in a LAN. EXPERT: Understand what is meant by the performance of a network and explain the factors that can affect the performance of a network. Complete the Network Hardware Worksheet Match up the network hardware term to the definition. Starter activity Stuck? Use the internet to help.