Open Shortest Path First (OSPF) is a classless interior gateway protocol (IGP). It is used within larger autonomous system networks in preference to the legacy distance vector routing protocols. OSPF is designated by the Internet Engineering Task Force... Learn More>>
Frame Relay is a high-performance WAN protocol that operates at the physical and data link layers of the OSI reference model. It was standardized by the ITU-T. Frame Relay was one of the most extensively used WAN protocols, primarily because it was inexpensive... Learn More>>
One of the most common types of WAN connection is the point-to-point connection. A point-to-point connection is also referred to as a serial connection or leased-line connection, because the lines are leased from a carrier and are dedicated for use by... Learn More>>
LANs are a relatively low-cost means of sharing expensive resources. LANs allow multiple users in a fairly small geographic area to exchange files and messages, and to access shared resources such as file servers. LANs have rapidly evolved into support systems that... Learn More>>
To identify design considerations for embedded management functionality in Cisco IOS software Learn More>>
Most complex networks include redundant devices to avoid single points of failure. Although a redundant topology eliminates some issues, it can introduce other problems. Spanning-Tree Protocol (STP) is a Layer 2 link management protocol... Learn More>>
Cisco virtual private network (VPN) solutions provide an Internet-based WAN infrastructure for connecting branch offices, home offices, business partner sites, and remote telecommuters to all or portions of a company network. Learn More>>
Access control is very important within any organization and once you understand the uses of Access Control Lists (ACLs), you can determine how to implement them on your Cisco network. Using ACLs, you can apply a number of features to the classified packets,... Learn More>>
Understanding the packet delivery process is a fundamental part of understanding how Cisco networking devices work. Once you have an understanding of how data travels in your network, securing and managing your resources... Learn More>>
Security is a major concern, especially in today’s networks, and network administrators must pay close attention to it. Complete network security starts with device-based security on routers and switches. Routers and switches that are... Learn More>>
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