iStudy Networking

TCP/IP is based on a four-layer reference model. All protocols that belong to the TCP/IP protocol suite are located in the top three lay...

By looking at the addressing structures, you can see that even with a Class C address, there are a large number of hosts per network. Suc...

Because TCP/IP networks are interconnected across the world, each computer on the Internet must have a unique address (called an IP addres...

What is a Router? A router is a device that forwards traffic between networks based on network layer information in the data and on rout...

What is IT-Security? IT-Security is not a product, it's a process. Don't think to buy a firewall which solves all your security p...

CCNA Certification Cisco Certified Network Associate (CCNA®) validates the ability to install, configure, operate, and troubleshoot ...

Cisco IOS Software is the industry-leading and is the most widely deployed network system software. This topic describes the features and...

Layer 1 - Devices and Their Functions Layer 1 defines the electrical, mechanical, procedural, and functional specifications for activ...

DNS is a mechanism for converting symbolic names into IP addresses. The DNS application frees users of IP networks from the burden of havi...

The first task in understanding how to build a computer network is defining what a network is and understanding how it is used to help a b...

From Wikipedia, the free encyclopedia Jump to: navigation , search CCNA is the acronym for the Cisco Certified Network Associate cer...