TCP and UDP

TCP and UDP

The two most common transport layer protocols of the TCP/IP protocol suite are Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). Both protocols manage the communication of multiple applications. The differences between the two are the specific functions that each protocol implements.

Routing Protocols Evolution and Classification...

Routing Protocols Evolution and Classification...

Dynamic Versus Static Routing

Dynamic Versus Static Routing

Dynamic routing certainly has several advantages over static routing. However, static routing is still used in networks today. In fact, networks typically use a combination of both static and dynamic routing.

Dynamic Routing Protocol Concepts

Dynamic Routing Protocol Concepts

Perspective and Background

As networks have evolved and become more complex, new routing protocols have emerged. One of the earliest routing protocols, Routing Information Protocol (RIP), has evolved into a newer version, RIPv2. To address the needs of larger networks, two advanced routing protocols were developed: Open Shortest Path First (OSPF) and Intermediate System–to–Intermediate System (IS-IS). Cisco developed Interior Gateway Routing Protocol (IGRP) and Enhanced IGRP (EIGRP), which also scales well in larger network implementations.

Additionally, there was the need to interconnect different internetworks and provide routing among them. Border Gateway Protocol (BGP) is now used between Internet service providers (ISP) as well as between ISPs and their larger private clients to exchange routing information. With the advent of numerous consumer devices using IP, the IPv4 addressing space is nearly exhausted. Thus, IPv6 has emerged, which has required newer versions of the IP routing protocols to be developed.

Introduction for CCENT & CCNA

CCENT

Cisco Certified Entry Networking Technician (CCENT) validates the ability to install, operate and troubleshoot a small enterprise branch network, including basic network security. With a CCENT, a network professional demonstrates the skills required for entry-level network support positions - the starting point for many successful careers in networking. The curriculum covers networking fundamentals, WAN technologies, basic security and wireless concepts, routing and switching fundamentals, and configuring simple networks. CCENT is the first step toward achieving CCNA, which covers medium-size enterprise branch networks with more complex connections.

CCNA

Cisco Certified Network Associate (CCNA) is a certification program for entry-level network engineers that helps maximize your investment in foundational networking knowledge and increase the value of your employer's network. CCNA is for Network Specialists, Network Administrators, and Network Support Engineers with 1-3 years of experience. The CCNA validates the ability to install, configure, operate, and troubleshoot medium-size routed and switched networks.