Let's Start Networking

Greetings,

Well, well, well. The knowledge gained within the world of security thus far has been great. Understanding how many tools are used is important, but learning networking fundamentals is key to the protection and security ones system. Personally, I've always understood how the internet works, but didn't really have the terminology down pact. Because of this, I am taking time while undergoing cyber studies to also grasp the knowledge of networking. Hopefully while studying I'll be able to gain my networking certification. Not sure which one due to more research, but one that stood out was the CCNA. It's provided through Cisco and they offer many great resources to learn. Well without further or due, let's get into day one of networking concepts I took notes of. More will be added in future post, but this can provide a jump start.

What is a network:
A system of interconnected devices that can communicate using some common standards called Internet Protocol Suite (TCP/IP)

Types of Networks
Local Area Network (LAN):
Personal Area Network (PAN):
Metropolitan Area Network (MAN):
Wide Area Network (WAN):
Wireless Local Area Network (WLAN):

Server:
A device that provides functions or services for clients

Client:
A device that accesses a service made available by a server

• There are two types of endpoints or end hosts, these are servers and clients.
• The same device can be both depending on the situation.

What are Switches?

• Have network interfaces/ ports for end host to connect to (usually 24+)
• Provide connectivity to hosts within the same LAN (Local Area Network)
• Do not provide connectivity between LANs/over the internet.

What are Routers?

• Have fewer network interfaces than switches
• are used to provide connectivity between LANs
• used to send data over the internet

What are Firewalls?

• monitor and control network traffic based on config rules
• placed outside the router or inside the network protecting the end host (PCs and switches, etc) of the network.

Network Firewalls:
Are hardware devices that filter traffic between networks. One will is a Next Gen Firewall.

Next Generation Firewall:
Combines traditional firewalls feats with more advanced filtering functionalities

Host based Firewall:
Are software apps that filter traffic entering and exiting a host machine like a PC. Not a network firewall.

Resources

Basic Knowledge of Networks

What is CCNA?

CCNA Online Study Tool