Ccna routing and Switching Complete Study Guide

Intelligent Virtualization    Cisco’s IWAN offers a virtual WAN overlay over any transport 

type, which doesn’t compromise application performance, availability, or security.

Automation    This Cisco IWAN technology provides network services by provisioning 

security and application policies.

Cloud Integration    An innovation that permits private cloud integration through APIC and 

public cloud application optimization with security.

Service Virtualization    Cisco’s IWAN delivers virtual services on specialized router plat-

forms as well as virtual routers and services on x86 server platforms.

Self-Learning Networks    Using policies, this technology leverages network analytics to 

proactively optimize the infrastructure.

We’re going to pause a second and head back in time to cover some good old serial 

connections, which still actually happen to be a valid form of connecting via a WAN.

Cabling the Serial Wide Area Network

As you can imagine, there are a few things that you need to know before connecting your 

WAN to ensure that everything goes well. For starters, you have to understand the kind of 

WAN Physical layer implementation that Cisco provides and be familiar with the various 

types of WAN serial connectors involved.

The good news is that Cisco serial connections support almost any type of WAN service. 

Your typical WAN connection is a dedicated leased line using HDLC or PPP, with speeds 

that can kick it up to 45 Mbps (T3).

HDLC, PPP, and Frame Relay can use the same Physical layer specifications. I’ll go over 

the various types of connections and then move on to tell you all about the WAN protocols 

specified in the ICND2 and CCNA R/S objectives.