30 October 2015 RE Meyers, Ms.Ed., CCAI CCENT ICND1 Exam Topics Review Describe the Operation of Data Networks: Network Diagrams and Data Paths

30 October 2015 Disclaimer  This review is for the exclusive non-profit use by Cisco Academy instructors and students only!  Contents of this review were derived from the following sources under the doctrine of US copyright “Fair Use” section 107: Cisco Networking Academy Curricula: Discovery Networking for Home and Small Businesses version 4.x Interactive Course Guide, Cisco Learning Institute CCENT/CCNA ICND 1 Official Exam Certification Guide, 2 nd ed. by Wendell Odom, Cisco Press, 2008; ISBN Cisco Learning Network Other references footnoted in individual slide notes area.

30 October 2015 Error Reporting  Please report any errors in this presentation to:   Don’t rant! Let me know where I made a mistake so it can be fixed.  Feel free to modify this presentation to suit your needs. Please remove the WVU master and my name from your edited presentation to protect WVU’s logo acceptable use policy.

30 October 2015 CCENT Exam Topics  Describe the operation of data networks  Interpret network diagrams  Determine the path between hosts across a network  Differentiate between LAN/WAN operation and features

30 October 2015 Physical Network Topology  A representation of the physical interconnections of the elements of a computer network

30 October 2015 Logical Topology  Groups hosts by how they use the network, not by where they are physically located.  Host names, addresses, group information and applications can be recorded on the logical topology map

30 October 2015 Local Area Network  LANs were defined as small networks that existed in a single physical location

30 October 2015 Local Area Network  The definition of LAN has evolved  May include interconnected local networks consisting of many hundreds of hosts, installed in multiple buildings and locations under one administrative control.

30 October 2015 Count the LAN’s

30 October 2015 Count the LAN’s 1

30 October 2015 Ethernet Data Path Between Hosts on a LAN Hub  When a host on an Ethernet network communicates, it sends frames containing:  Its own MAC address as the source  The MAC address of the intended recipient

30 October 2015 Ethernet Data Path Between Hosts on a LAN Switch  A switch accepts and decodes frames to read the physical (MAC) address portion of the message  Using a MAC table, it sends the frame out only through the port where the destination MAC address is located.

30 October 2015 Wide Area Network  WANs are used to connect LANs and other types of networks together over a broad area  Link across metropolitan, regional, or national boundaries

30 October 2015 WAN  Can be connected via  Internet  Leased lines

30 October 2015 WAN Connectivity

30 October 2015 WAN Connectivity Bandwidth

30 October 2015 WAN Traffic Flow:

30 October 2015 Internet  Tier 1 ISPs  Huge organizations that physically connect directly with each other through private peering  Tier 2 ISPs  Can also be very large, even extending across several countries, but very few have networks that span entire continents or between continents  Tier 3 ISPs  Generally found in major cities and provide customers local access to the Internet..

30 October 2015