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…
Month: April 2009
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…
10 Things You Should Know About the Cisco CCNA Security Certification
1. What industry trends motivated Cisco to create the CCNA Security certification? Cisco created the CCNA Security certification to offer new IT professionals a rapid path to specialization in security as well…
10 Things You Should Know About the Cisco CCNA Voice Certification
1. What are the industry trends that motivated Cisco to create the CCNA Voice concentration? Today, organizations of all types are moving toward a single, IP-based network that carries data, voice, and…
CCNP BCMSN(642-812) Lab – AAA dot1x(New)
Acme is a small shipping company that has an existing enterprise network comprised of 2 switches;DSW1 and ASW2. The topology diagram indicates their layer 2 mapping. VLAN 40 is a new VLAN…
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…