Class work 1
- 1. Course Code: CSE 317 Course Title: Computer networks Topics: Hub, switch, Router, Bridge, Repeater, Transmission Mode(Simplex, Half-Duplex, Full-Duplex), Computer Network(LAN, MAN,WAN,CAN),IP Address. Submitted To: Pranab Bandhu Nath Senior Lecturer, CSE Department, City University, Dhaka Submitted By: Name: Razia Sultana Himu ID: 1915002542 Batch: 50th
- 2. Hub: A hub is a physical layer networking device which is used to connect multiple devices in a network. Hub is a network hardware device for connecting multiple Ethernet devices together and making them act as a single network segment. Switch: A network switch is a multiport network bridge that uses MAC addresses to forward data at the data link layer of the OSI model. • Devices are connected to the switch using Ethernet cables creating a small LAN. • The switch learns the MAC addresses of the connected devices. • When traffic needs to go to a specific device, the switchsees the MAC address in the packet and sends it to only that device. Router: Routers are the network devices that route packets between networks. Multiple subnets within the same WAN to the internet connection that allows you to read this article . Bridge: A network bridge is a computer networking device that creates a single, aggregate network from multiple communication networks or network segments. This function is called network bridging. Bridging is distinct from routing. • A network switch • A device that can connect two networks using different connection mediums, such as connecting a WLAN to a wired LAN. Repeater:
- 3. Repeaters are used to extend transmissions so that the signal can cover longer distances or be received on the other side of an obstruction. Repeater has the potential to strengthen signals so as that it are often retransmitted much stronger with better performance. Simplex: In Simplex mode, the communication is unidirectional, as on a one-way street. Only one of the two devices on a link can transmit, the other can only receive.The simplex mode can use the entire capacity of the channel to send data in one direction. Example: Keyboard and traditional monitors. Half Duplex: In half-duplex mode, each station can both transmit and receive, but not at the same time. When one device is sending, the other can only receive, and vice versa. The half-duplex mode is used in cases where there is no need for communication in both directions at the same time. Full Duplex: Full-duplex data transmission means that data can be transmitted in both directions on a signal carrier at the same time. For example, on a local area network with a technology that has full- duplex transmission, one workstation can be sending data on the line while another workstation is receiving data. LAN: A local area network is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus or office building. By contrast, a wide area network not only coversa larger geographic distance, but also generally involves leased telecommunication circuits. Home Wi-Fi networks and small business networks are common examples of LANs. Metropolitan Network: A metropolitan area network (MAN) is a computer network that connects computers within a metropolitan area, which could be a single large city, multiple cities and towns, or any given large area with multiple buildings. A MAN is larger than a local area network (LAN) but smaller than a wide area network (WAN).
- 4. WAN: A wide area network (WAN), is a large network of information that is not tied to a single location. WANs can facilitate communication, the sharing of information and much more between devices from around the world through a WAN provider. CAN: A campus area network (CAN) is a computer network that spans a limited geographic area. CANs interconnect multiple local area networks (LAN) within an educational or corporate campus. Most CANs connect to the public Internet. ... In contrast, MANs and WANs may combine infrastructure operated by several different providers. Whereto internet must be exist Mac Address 1 2 Mac Mac Physical Address 48bit 24bit 24bit OUI VS Organization Unit Identifier Vandor Spceification Internet Protocol:
- 5. Protocol means rules and regulation Layer 3 protocol that forwards datagrams across internet Uses routing tables prepared by routing protocols, Open Shortest Path First (OSPF), Routing Information Protocol (RIP) Connectionless service vs connection-oriented (circuits). 32bit iPv4 iP6 Public IP Private IP Id- 0-255 255 still can this assign ID 101. 205. 255. 127 8bit 8bit 8bit 8bit 8bit means octal Network IP = host id IP IP Address Class A 1- 126 Class B 128- 191 Class C 192- 223 Class D 224- 239 Class E 240- 255