CCENT 640-822 ICND1

Exam Number: 640-822 ICND1
Associated Certifications: CCENT and CCNA
Duration: 90 minutes (40-50 questions)

The 640-822 Interconnecting Cisco Networking Devices Part 1 (ICND1) is the exam associated with the Cisco Certified Entry Network Technician certification and a tangible first step in achieving the Cisco Certified Network Associate certification. This exam tests a candidate's knowledge and skills required to successfully install, operate, and troubleshoot a small branch office network. The exam includes topics on networking fundamentals; connecting to a WAN; basic security and wireless concepts; routing and switching fundamentals; the TCP/IP and OSI models; IP addressing; WAN technologies; operating and configuring IOS devices; configuring RIPv2, static and default routing; implementing NAT and DHCP; and configuring simple networks.


Exam Topics


Describe the operation of data networks

Describe the purpose and functions of various network devices 1 2 3

Select the components required to meet a given network specification 1 2 3

Use the OSI and TCP/IP models and their associated protocols to explain how data flows in a network 1 2

Describe common networking applications including web applications

Describe the purpose and basic operation of the protocols in the OSI and TCP models 1 2

Describe the impact of applications (Voice Over IP and Video Over IP) on a network 1 2 3

Interpret network diagrams

Determine the path between two hosts across a network 1 2 3

Describe the components required for network and Internet communications

Identify and correct common network problems at layers 1, 2, 3 and 7 using a layered model approach

Differentiate between LAN/WAN operation and features


Implement a small switched network
Select the appropriate media, cables, ports, and connectors to connect switches to other network devices and hosts

Explain the technology and media access control method for Ethernet technologies

Explain network segmentation and basic traffic management concepts

Explain the operation of Cisco switches and basic switching concepts

Perform, save and verify initial switch configuration tasks including remote access management

Verify network status and switch operation using basic utilities (including: ping, traceroute,telnet,SSH,arp, ipconfig), SHOW & DEBUG commands

Implement and verify basic security for a switch (port security, deactivate ports)

Identify, prescribe, and resolve common switched network media issues, configuration issues, autonegotiation, and switch hardware failures


Implement an IP addressing scheme and IP services to meet network requirements for a small branch office
Describe the need and role of addressing in a network " Create and apply an addressing scheme to a network

Assign and verify valid IP addresses to hosts, servers, and networking devices in a LAN environment

Explain the basic uses and operation of NAT in a small network connecting to one ISP

Describe and verify DNS operation

Describe the operation and benefits of using private and public IP addressing

Enable NAT for a small network with a single ISP and connection using SDM and verify operation using CLI and ping

Configure, verify and troubleshoot DHCP and DNS operation on a router.(including: CLI/SDM)

Implement static and dynamic addressing services for hosts in a LAN environment

Identify and correct IP addressing issues


Implement a small routed network
Describe basic routing concepts (including: packet forwarding, router lookup process)

Describe the operation of Cisco routers (including: router bootup process, POST, router components)

Select the appropriate media, cables, ports, and connectors to connect routers to other network devices and hosts

Configure, verify, and troubleshoot RIPv2

Access and utilize the router CLI to set basic parameters

Connect, configure, and verify operation status of a device interface

Verify device configuration and network connectivity using ping, traceroute, telnet, SSH or other utilities

Perform and verify routing configuration tasks for a static or default route given specific routing requirements

Manage IOS configuration files (including: save, edit, upgrade, restore)

Manage Cisco IOS

Implement password and physical security

Verify network status and router operation using basic utilities (including: ping, traceroute,telnet,SSH,arp, ipconfig), SHOW & DEBUG commands


Explain and select the appropriate administrative tasks required for a WLAN
Describe standards associated with wireless media (including: IEEE WI-FI Alliance, ITU/FCC)

Identify and describe the purpose of the components in a small wireless network. (including: SSID, BSS, ESS)

Identify the basic parameters to configure on a wireless network to ensure that devices connect to the correct access point

Compare and contrast wireless security features and capabilities of WPA security (including: open, WEP, WPA-1/2)

Identify common issues with implementing wireless networks


Identify security threats to a network and describe general methods to mitigate those threats
Explain today's increasing network security threats and the need to implement a comprehensive security policy to mitigate the threats

Explain general methods to mitigate common security threats to network devices, hosts, and applications

Describe the functions of common security appliances and applications

Describe security recommended practices including initial steps to secure network devices


Implement and verify WAN links
Describe different methods for connecting to a WAN

Configure and verify a basic WAN serial connection

Recommended Training
The following course is the recommended training for this exam:

Interconnecting Cisco Networking Devices Part 1 (ICND1) v1.0

The course listed is offered by Cisco Learning Partners the authorized source for Cisco IT training delivered exclusively by Certified Cisco Instructors. For a list of Cisco Learning Partners, use the Learning Partner Locator.


Additional Resources
A variety of Cisco Press titles may be available for this exam. These titles can be purchased through the Cisco Marketplace Bookstore,or directly from Cisco Press.

Describe the purpose and functions of various network devices 1

Describe the purpose and functions of various network devices Routers and switches can be classed as network devices.

What is a Router?

Routers operate at Layer3 of the OSI Layer and are categorized in the Network Layer. A router can be programmed to find the best routes between networks. The router can traverse many networks and is capable of choosing the best route to the destination. Offices in different and remote locations can be connected together using routers using dedicated or switched lines. The lines are usually provided by telephone companies or Internet Service Providers (ISPs). The routers connect to lines using serial interfaces which usually come installed in the device. Connecting the lines to the serial interfaces on the router allow for a Wider Area Network (WAN) connection.

For example, if you have one office in New York and other in London then connecting in the above way will allow for the sending of data and voice transmissions. The Internet is made up of thousands of routers and this allows people all over the globe to communicate using for example, email. Routers by default do not send broadcasts as it is routing data.

If wires are used, each computer is connected by its own wire to the router. Modern wired-only routers designed for the home or small business typically have one “input” port (to the Internet) and four “output” ports, one or more of which can be connected to other computers. A typical modern home wireless router, in addition to having four wired ports, also allows several devices to connect with it wirelessly. Most modern personal computers are built with a wired port (almost always an Ethernet type), which allows them to connect to a router with the addition of just a cable (typically a Category type). To connect with a wireless router, a device must have an adapter. This is sometimes, but not always, included with the computer at manufacture. Some electronic games, including handheld electronic games, have an adapter built-in, or one can be added later.

More technically, a router is a networking device whose software and hardware are usually tailored to the tasks of routing and forwarding information. Routers connect two or more logical subnets, which do not necessarily map one-to-one to the physical interfaces of the router. The term “layer 3 switching” is often used interchangeably with routing, but switch is a general term without a rigorous technical definition. In marketing usage, a switch is generally optimized for Ethernet LAN interfaces and may not have other physical interface types.

In comparison, the network hub (predecessor of the “switch” or “switching hub”) does not do any routing, instead every packet it receives on one network line gets forwarded to all the other network lines.

Routers operate in two different planes:

Control plane, in which the router learns the outgoing interface that is most appropriate for forwarding specific packets to specific destinations,
Forwarding plane, which is responsible for the actual process of sending a packet received on a logical interface to an outbound logical interface.
Types of routers

Routers may provide connectivity inside enterprises, between enterprises and the Internet, and inside Internet Service Providers (ISPs). The largest routers (for example the CiscoCRS-1 or Juniper T1600) interconnect ISPs, are used inside ISPs, or may be used in very large enterprise networks. The smallest routers provide connectivity for small and home offices.

Routers for Internet connectivity and internal use

Router Cisco Wireless
Routers intended for ISP and major enterprise connectivity will almost invariably exchange routing information with the Border Gateway Protocol (BGP). RFC 4098 defines several types of BGP-speaking routers:

Edge Router – Placed at the edge of an ISP network, it speaks external BGP (EBGP) to a BGP speaker in another provider or large enterprise Autonomous System(AS).
Subscriber Edge Router – Located at the edge of the subscriber’s network, it speaks EBGP to its provider’s AS(s). It belongs to an end user (enterprise) organization.
Inter-provider Border Router – Interconnecting ISPs, this is a BGP speaking router that maintains BGP sessions with other BGP speaking routers in other providers’ ASes.
Core router – A router that resides within the middle or backbone of the LAN network rather than at its periphery.
Within an ISP – Internal to the provider’s AS, such a router speaks internal BGP (IBGP) to that provider’s edge routers, other intra-provider core routers, or the provider’s inter-provider border routers.
“Internet backbone” – The Internet does not have a clearly identifiable backbone, as did its predecessors. See default-free zone(DFZ). Nevertheless, it is the major ISPs’ routers that make up what many would consider the core. These ISPs operate all four types of the BGP-speaking routers described here. In ISP usage, a “core” router is internal to an ISP, and used to interconnect its edge and border routers. Core routers may also have specialized functions in virtual private networks based on a combination of BGP and Multi-Protocol Label Switching (MPLS).
Routers are also used for port forwarding for private servers.