Configuring Cisco IOS Configuration mode is one of the modes for the Cisco CLI. It is similar to user mode and privileged mode. User mode allows commands that are not disruptive to…
Category: CCNA R&S
Routing and Switching
Cisco IOS Overview
Cisco routers run the Cisco Internetworking Operating System (IOS) with a command-line interface (CLI). The IOS also runs on some Cisco switch models, and it uses CLI. However, in some cases, the…
Wireless Networks
Conventional Ethernet networks require cables connected computers via hubs and switches. This has the effect of restricting the computer’s mobility and requires that even portable computers be physically connected to a hub…
Bridging and Swtiching
Bridging is used to connect two network segments. This alleviates congestion problems on a single Ethernet segment and extends allowed cabling distances because the segments on each side of the bridge conformed…
Internetworking/Networks
A network is defined as a group of two or more computers linked together for the purpose of communicating and sharing information and other resources, such as printers and applications. Most networks…
The TCP/IP Model
TCP/IP and the OSI Reference Model As illustrated in Figure 1.2, the TCP/IP model consists of four layers, each of which can have several sublayers. These layers correlate roughly to layers in…
The 7 Layer OSI Model
The OSI Reference Model The OSI is the Open System Interconnection reference model for communications. As illustrated in Figure 1.1, the OSI reference model consists of seven layers, each of which can…
Converting IPv4 to IPv6 and back
Converting from IPv4 to IPv6 Is so easy, yet everyone seem to convert a IPv4 address to binary, then to IPv6. Why? Why waste time and do things the long way? Not…
CCNA Quick Notes – TCP/IP
1.What are the four layers of the TCP/IP layer model? The four layers of the TCP/IP layer model are: Application (process) Host-to-host (transport) Internet Network Access (physical and data link) 2.What two…