30 october 2015 re meyers, ms.ed., ccai ccent 640-822 icnd1 exam topics review describe the...
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April 20, 2023 RE Meyers, Ms.Ed., CCAI
CCENT 640-822 ICND1 Exam Topics ReviewCCENT 640-822 ICND1 Exam Topics Review
Describe the Operation of Data Networks:
Network Diagrams and Data Paths
April 20, 2023
DisclaimerDisclaimer
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, 2nd ed.
by Wendell Odom, Cisco Press, 2008; ISBN1-58720-182-2• Cisco Learning Network
https://learningnetwork.cisco.com/docs/DOC-4987• Other references footnoted in individual slide notes area.
April 20, 2023
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April 20, 2023
CCENT Exam TopicsCCENT Exam Topics
Describe the operation of data networksInterpret network diagramsDetermine the path between hosts across a networkDifferentiate between LAN/WAN operation and features
https://learningnetwork.cisco.com/docs/DOC-4987
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Physical Network TopologyPhysical Network Topology
A representation of the physical interconnections of the elements of a computer network
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Logical TopologyLogical 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
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Local Area NetworkLocal Area Network
LANs were defined as small networks that existed in a single physical location
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Local Area NetworkLocal 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.
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Count the LAN’sCount the LAN’s
1
23
4
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Count the LAN’sCount the LAN’s
1
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Ethernet Data Path Between Hosts on a LAN HubEthernet 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
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Ethernet Data Path Between Hosts on a LAN SwitchEthernet Data Path Between Hosts on a LAN Switch
A switch accepts and decodes frames to read the physical (MAC) address portion of the messageUsing a MAC table, it sends the frame out only through
the port where the destination MAC address is located.
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Wide Area NetworkWide 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
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WANWAN
Can be connected viaInternetLeased lines
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WAN ConnectivityWAN Connectivity
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WAN Connectivity BandwidthWAN Connectivity Bandwidth
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WAN Traffic Flow: E-mailWAN Traffic Flow: E-mail
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Internet Internet
Tier 1 ISPs Huge organizations that physically connect directly with
each other through private peering
Tier 2 ISPsCan 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..
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