Networking devices allow communication between devices on a computer network. The document defines 11 common networking devices: hub, repeater, bridge, switch, access point, router, network interface card, multilayer switch, firewall, intrusion detection system, and intrusion prevention system. It provides details on the purpose and functions of each device, with hubs connecting devices on a LAN, switches filtering traffic through MAC addresses, routers connecting multiple networks, and firewalls establishing barriers between trusted and untrusted networks.

1. Chapter five
Networking devices
Abdi Aziz Hussein Ahmed
Copy right @Somali network classroom

2. Definition of networking
devices
 Network devices, or networking
hardware, are physical devices that are
required for communication and
interaction between hardware on a
computer network.

3. Types of networking devices
 Here is the common network device list:
1. Hub
2. Repeater
3. Bridge
4. Switch
5. Access-Point
6. Router
7. Network Interface Card
8. Multi-layer switch
9. Firewall
10. Intrusion Detection System
11. Intrusion Prevention System
12. server

4. 1. Hub
 Properties of Hub devices :
 hub is the simplest in the family of network connecting
devices because it connects LAN
 Hub operate physical layer in OSI.
 Hub have one collision domain
 Hub have one broadcast domain
 Hubs do not perform packet filtering or addressing
functions
 There are two types of hubs: simple and multiple port

5. 2. Repeater
 Properties of repeater
 A repeater is an electronic device that amplifies the
signal it receives.
 When the received signal

6. 3. bridge
 Properties of bridge:
 . The basic role of bridges in network
architecture is storing and forwarding
frames between the different segments
that the bridge connects.
 Bridge operate in data-link layer in OSI.

7. 4. Switch
 Properties of switch
 Switches generally have a more intelligent role than
hubs.
 Switch operate data-link layer in OSI.
 Switch more than interfaces than hub device
 Switch has many collision domains
(each port have one collision domain ).
 Switch has one broadcast domain.
 Switch perform frame filtering using mac-address table.
 There are two types of switch: normal switch and layer
3 switch

8. 5. Access-Point
 Properties of access-Point
 AP generally connected wireless LAN.
 AP operate data-link layer in OSI model.
 To connect to a wireless AP, you need a service set
identifier (SSID) name.

9. 6. Router
 Properties of router
 Router generally connect two or more networks .
 Router operate network layer in OSI.
 Routers are your first line of defense.
 Router perform packet filtering using IP routing table

10. 7. Network Interface Card
 Properties of NIC
 A network interface controller is a computer hardware
component that connects a computer to a computer
network.

11. 8. Multi layer switch
 Properties Of multi layer switch:
 A multilayer switch is a computer networking device
that switches on OSI layer 2 like an ordinary network
switch and provides extra functions on higher OSI layers
(layer three like router).

12. 9. firewall
 Properties of firewall :
 In computing, a firewall is a network security system
that monitors and controls incoming and outgoing
network traffic based on predetermined security rules.
 A firewall typically establishes a barrier between a
trusted network and an untrusted network, such as the
Internet.

13. 10. Intrusion Detection System
 Properties of IDS :
 An intrusion detection system is a device or software
application that monitors a network or systems for
malicious activity or policy violations.

14. 11. Intrusion prevention
System
 Properties of IPS :
 An Intrusion Prevention System is a device or software
application that monitors and control a network or
systems for malicious activity or policy violations.

15. 12.serve
 Properties of server
 A server is a computer program or device that provides
a service to another computer program