Network hub
What is a network hub, Function of a network Hub
Hubs were the common network infrastructure devices used for Local Area Network (LAN) connectivity but network switches are rapidly replacing hubs. These days it is very difficult to spot a Network Hub functioning in a live Local Area Network (LAN). Hubs function as the central connection point for Local Area Network (LAN). Hubs are designed to work with Twisted pair cabling and normally use RJ45 jack to connect the devices. Network devices (Servers, Workstations, Printers, Scanners etc) are attached to the hub by individual network cables. Hubs usually come in different shapes and different numbers of ports.
When a hub receives a packet of data (an Ethernet frame) at one of its ports from a network device, it transmits (repeats) the packet to all of its ports to all of the other network devices. If two network devices on the same network try to send packets at the same time a collision is said to occur.
Hubs are considered to operate at Physical Layer (Layer 1) of OSI model. An 8 port hub is shown below.
Chapter 1 :- Introduction to Computer Networking
Chapter 2 :- What is a Computer Network
Chapter 3 :- Why we need computer networks
Chapter 4 :- Client Operating Systems
Chapter 5 :- Common Network Application Software
Chapter 6 :- LAN and WAN
Chapter 7 :- CAN and MAN
Chapter 8 :- Peer-to-Peer networks and Client-Server networks
Chapter 9 :- Centralized and Distributed Computer Networks
Chapter 10 :- Internetworks, Internet, Intranet and Extranet
Chapter 11 :- What is a Network Protocol
Chapter 12 :- Difference between Proprietary and Standard Protocols
Chapter 13 :- What are RFCs
Chapter 14 :- Organizations which control Internet
Chapter 15 :- Bus Topology
Chapter 16 :- Star Topology
Chapter 17 :- Mesh, Ring and Hybrid Topologies
Chapter 18 :- Network Infrastructure Devices and Icons
Chapter 19 :- Network Hub
Chapter 20 :- Network Bridge
Chapter 21 :- What is a Router
Chapter 21 :- What is a Firewall
Chapter 22 :- Office Networks
Chapter 23 :- Hub-and-spoke WAN topology
Chapter 24 :- Partial-Mesh WAN topology
Chapter 25 :- Full-mesh Site-to-site WAN topology
Chapter 26 :- What is NIC
Chapter 27 :- Common Network Cable types
Chapter 28 :- Difference between Baseband and Broadband
Chapter 29 :- CSMA/CD, CSMA/CA and Token Passing
Chapter 30 :- LAN Technologies Ethernet
Chapter 31 :- Ethernet Media Standards
Chapter 32 :- What is Token Ring
Chapter 33 :- What is FDDI
Chapter 34 :- IEEE 802 Standards
Networking Interview Questions :- 1
Networking Interview Questions :- 2
Networking Interview Questions :- 3
Networking Interview Questions :- 4
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