The focus of this course is on the WAN technologies and network services required by converged applications in a complex network.
Cisco teaches us about the connections in the technical side of the world. It provides products and services that transport voice, data and video around the world. The company designs and manufactures products and services associated with the communications and IT industry as well as internet protocol networking. There are three categories of products offered by Cisco: core technology, routing and switching, advanced technology, and other products.
A WAN operates beyond the geographic scope of a LAN. As shown in the figure, WANs are used to interconnect the enterprise LAN to remote LANs in branch sites and telecommuter sites.
The cable system uses a coaxial cable that carries radio frequency (RF) signals across the network. Coaxial cable is the primary medium used to build cable TV systems.
Modern cable systems offer customers advanced telecommunications services, including high-speed Internet access, digital cable television, and residential telephone service. Cable operators typically deploy hybrid fiber-coaxial (HFC) networks to enable high-speed transmission of data to cable modems located in a SOHO.
he chapter then explains how to configure and troubleshoot extended IPv4 ACLs and IPv6 ACLs on a Cisco router as part of a security solution. Included are tips, considerations, recommendations, and general guidelines on how to use ACLs. In addition, this chapter includes an opportunity to develop your mastery of ACLs with a series of lessons, activities, and lab exercises.
This chapter covers common LAN security threats and how to mitigate them. It then covers SNMP and how to enable it to monitor a network, and how to implement local SPAN to capture and monitor traffic with port analyzers or IPS devices.
This chapter describes network transmission quality, traffic characteristics, queueing algorithms, QoS models, and QoS implementation techniques.
The Internet of Things (IoT) is a phrase that denotes the billions of electronic devices that are now able to connect to our data networks and the Internet. Cloud computing and virtualization is enabling individuals and organizations to store and access large amounts of data without worrying about the physical components.
Software-defined networking (SDN) is redefining how network administrators think about the architecture of their networks.
This chapter introduces you to these emerging trends in today’s networks.
This chapter describes general troubleshooting procedures, methods, tools, and the network documentation that should be maintained. Typical symptoms and causes at several layers of the OSI model are also discussed.