This tutorial gives you an overview and talks about the fundamentals of CCNA.
CCNA (Cisco Certified Network Associate) is an IT certification from Cisco.
Once you know the basics of networking during our CCNA training, we’ll help you understand both the OSI reference model and the TCP/IP model. Both of these models are very important for you to understand from not only from the CCNA exam perspective, but also for the rest of your networking career.
The seven-layered OSI model was discussed. It is important to remember the functions of all the layers and how they map to the TCP/IP model. Remember that hubs work at Physical Layer, switches at Data-Link Layer and routers at the Network Layer of the OSI model. And we will educate you on all the functions in our CCNA online training.
Cisco Internetwork Operating System (IOS). Cisco IOS is a proprietary operating system that Cisco routers and switches run on. Look at the boot process, connectivity options, ways to configure the devices and basic configuration and verification commands.
IP Routing is the process of moving packets from its source to its destination across internetworks. Unfortunately the process is not as simple as it sounds because it involves multiple protocols at multiple layers.
Network security has become one of the hottest topics in networking and the trend is likely to continue in the near future and why Cisco has developed the CCNA Security certification specialty.
IPsec (Internet Protocol Security) VPN is a standard defined by the IETF (Internet Engineering Task Force). IPsec is a popular framework used to secure communications over an insecure medium like the Internet at the network layer of the OSI reference model.
A wide-area network (WAN) enables you to extend your local-area network (LAN) to other LANs at remote sites. There are more than one ways to build wide-area networks employing various types of connections, technologies, and devices.
During our CCNA online trainings, We’ll introduce you to High-Level Data Link Control (HDLC), Point-to-Point Protocol (PPP), and Frame Relay on serial interfaces.
The OSI Layer 1 (physical layer) and Layer 2 (data link layer) work together to deliver data across a wide variety of network types. Local-Area Network (LAN) standards and protocols define how to network devices that are relatively close together, hence the term local-area in the acronym LAN.
Wide-Area Network (WAN) standards and protocols define how to network devices that are relatively far apart, hence the term wide-area in the acronym WAN. In our CCNA training, we’ll demonstrate, LANs and WANs both implement the same OSI Layer 1 and Layer 2 functions but with different mechanisms.
The big distinction between LANs and WANs relates to how far apart the devices can be and still be capable of sending and receiving data. LANs tend to reside in a single building or at most among nearby buildings in a campus using optical cabling approved for Ethernet.
See how WAN connections typically run much longer distances than Ethernet in our CCNA trainings. LANs: across town, between cities, or even between continents. Usually only one or a few companies even have the rights to run cables under the ground between the sites.
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