OVERVIEW OF NETWORKING
Networking is a critical area in IT that involves the design, implementation,
management,
and maintenance of networks to facilitate communication and data exchange
between
computers and other devices.
KEY CONCEPTS IN NETWORKING
Network: A collection of interconnected devices (computers, servers, routers,
etc.) that communicate with each other to share resources and information.
Protocol: A set of rules and conventions for communication between network
devices. Common protocols include TCP/IP, HTTP, FTP, and DNS.
IP Address: A unique identifier assigned to each device on a network, enabling it
to send and receive data.
Bandwidth: The maximum rate at which data can be transmitted over a network
connection.
Latency: The time it takes for data to travel from the source to the destination,
often measured in milliseconds (ms).
TYPES OF NETWORKS
Local Area Network (LAN): A network that covers a small geographical area, such
as a single building or campus. It is used to connect devices within close proximity
to share resources and information.
Wide Area Network (WAN): A network that spans large geographical areas, often
connecting multiple LANs over long distances. The internet is a prime example of
a WAN.
Metropolitan Area Network (MAN): A network that covers a city or large campus,
providing connectivity within a metropolitan area.
Personal Area Network (PAN): A small-scale network typically used for connecting
devices within an individual’s workspace, such as Bluetooth connections between
a smartphone and a laptop.
NETWORKING DEVICES
Router: A device that forwards data packets between computer networks.
Routers direct traffic and manage connections between different networks.
Switch: A device that connects multiple devices within a LAN, using MAC
addresses to forward data only to the specific device it’s intended for.
Hub: A basic networking device that connects multiple devices in a network.
Unlike switches, hubs broadcast data to all connected devices, which can lead to
inefficiencies.
Modem: A device that modulates and demodulates signals for data transmission
over telephone lines or other communication channels.
Firewall: A security device or software that monitors and controls incoming and
outgoing network traffic based on predetermined security rules.
NETWORK TOPOLOGIES
Bus Topology: All devices are connected to a single central cable, known as the
bus. It’s simple but can be less reliable due to its single point of failure.
Star Topology: All devices are connected to a central hub or switch. This topology
is more reliable as the failure of one cable does not affect the rest of the network.
Ring Topology: Devices are connected in a circular fashion. Data travels in one
direction around the ring, and a failure can disrupt the entire network.
Mesh Topology: Each device is connected to every other device in the network,
providing high redundancy and reliability but requiring more cabling and
configuration.
Hybrid Topology: A combination of two or more different topologies, providing
flexibility and scalability.
NETWORK PROTOCOLS
TCP/IP (Transmission Control Protocol/Internet Protocol): The fundamental
protocol suite for communication over the internet and most networks.
HTTP/HTTPS (Hypertext Transfer Protocol/Secure): Protocols used for transferring
web pages and data over the internet.
FTP (File Transfer Protocol): Protocol for transferring files between systems over a
network.
DNS (Domain Name System): System that translates human-readable domain
names (e.g., www.example.com) into IP addresses.
COURSE CONTENT FOR NETWORKING
- Introduction to Networking
- Networking Hardware and Devices
- IP Addressing and Subnetting
- Network Protocols and Communication
- Network Design and Architecture
- Network Security
- Network Troubleshooting and Management
- Advanced Networking Concepts
- Cloud Networking
SALARY OF NETWORK ADMINISTRATOR
united states
Entry-Level: $50,000 – $65,000 per year
Mid-Level: $65,000 – $85,000 per year
Senior-Level: $85,000 – $110,000+ per year
United Kingdom:
Entry-Level: £25,000 – £35,000 per year
Mid-Level: £35,000 – £50,000 per year
Senior-Level: £50,000 – £70,000+ per year
Canada:
Entry-Level: CAD 45,000 – CAD 60,000 per year
Mid-Level: CAD 60,000 – CAD 80,000 per year
Senior-Level: CAD 80,000 – CAD 100,000+ per year
JOB PROSPECT
- Network Administrator
- Network Engineer
- Network Architect
- Network Security Specialist
- Network Consultant
- Network Analyst
- Network Operations Center (NOC) Technician
- Cloud Network Engineer
- VoIP Engineer
- Wireless Network Engineer
- Network Project Manager
- Network Administrator
- Network Support Specialist
- IT Infrastructure Manager
- Network Automation Engineer
- Network Performance Engineer
- Network Field Engineer
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