Cisco Packet Tracer: introduction to the tool

A simulation program is based on models of a real-world and allows the user to perform operations, experiment with various combinations of actions or events, and visualize the results in a virtual environment.

What is Cisco Packet Tracer?

Cisco Packet Tracer is a powerful software that allows you to create and simulate network scenarios for testing. It features an easy-to-use and highly effective drag and drops interface when configuring complex networks.

Packet Tracer can also function as a hybrid network, to combine physical and simulated networks.

What is Cisco Packet Tracer used for?

Packet Tracer permits clients to make mimicked network geographies by moving routers, switches, and different sorts of organization gadgets.

What are the benefits of using Cisco Packet Tracer:

  • Free for all, institutions and private users

  • Ability to practice with Networking Academy's Cisco Packet Tracer labs

  • Users can run tests on all Cisco Packet Tracer compatible devices, including Windows, Linux, and Android mobile devices

  • You can use the Cisco IOS operating system without having a router and physical network

The Packet Tracer version 7.2.1 presents some important news that it is important to know before downloading. Another useful piece of information about the Cisco Packet Tracer is that to use the tool, you must register and create a Cisco Networking Academy account - a basic condition for downloading and using the software.

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What's new in Cisco Packet Tracer version 7.2.1:

Cisco Packet Tracer version 7.2.1 is basic maintenance and does not contain major updates. The full build of this version is There was a bug fix though. The flaw of previous versions of

Packet Tracer is in the phase of accessing the Packet Tracer software. The user had to log in again after each system reboot. Here are the main features of version 7.2:

Packet Tracer Workspace Enhancements 7.2

  • New themes

  • Align workspace objects

  • Ability to distribute the device on a specific rack

  • Accessibility updates

  • Ability to name a rack

Protocol and software improvements:

  •  PPPoE support

  • 802.1x (useful for a CCNP certification exam)

  • Real TCP Server

  • WebSocket

  • Classification of activities in real-time

  • Additional IOS security features

New devices in Packet Tracer 7.2

  • ASA 5506-X Firewall - Warning - FirePOWER functionality not supported

  • Meraki safety devices

  • Meraki server (for centralized configuration of Meraki security appliance, emulates Cisco Meraki dashboard)

  • Home router with advanced wireless features (2.4G, 5G, beamforming, wireless bridge)

How to download Packet Tracer

Follow the steps below to register on Networking Academy

  1. Click the "Sign up to download the tracker package" button

  2. Sign up for the Introduction to Packet Tracer course

  3. Complete your Networking Academy registration

  4. Start the Introduction to Packet Tracer course

  5. You will then be able to access the download

What is a package:

When we talk about packets, we refer to the internet protocol. For example, each web page comes with a set of packages to communicate with an external system, and each email sent is made up of packages.

Networks that send data broken down into small packets are called "packet switching".

On the Internet, the network divides an e-mail message into parts of a certain size in bytes. These are the packages. Each packet contains the information that will take the message sent to its destination:

the sender's IP address, the recipient's IP address, number of packets on which the e-mail message has been split.

Packets contain data in the protocols the Internet uses: Transmission Control Protocol / Internet Protocol (TCP / IP). Each packet contains part of the message body and can contain between 1,000 and 1,500 bytes.

What is a TCP / IP packet:

In its least complex structure, a packet is the fundamental unit of data in network transmission. Most networks use TCP / IP as a network protocol or set of rules for communicating between devices. The information broken down into packets contains a data segment and the destination address.

TCP / IP is considered to be the packet switching technology, the main advantage of which is that data can be routed to a destination through any number of transmission focuses, making the organization decentralized and less powerless against hardware disappointment. Unlike circuit switching, such as the telephone network, which establishes a dedicated connection between two points, it consumes more resources and is easier to interrupt.

How to create a network with Cisco Packet Tracer

  1. Open your network topology.

  2. Complete the wiring.

  3. Configure the IP addresses on the end devices.

  4. Configure IP addresses on routers and switches.

  5. Configure your default gateway.

  6. Check connectivity.


What is the switch in Cisco Packet Tracer?

The software allows users to simulate the configuration of Cisco routers and switches using a simulated command-line interface. Packet Tracer uses a drag and drops user interface, which allows you to add and remove simulated network devices at will.

Speaking of switches, the Cisco Catalyst 9300 series is certainly top-of-the-range and is as precious as gold for IT systems. Switch hardware equipment includes the Cisco IOS operating system and Network Stack software.

Both Network Stack licenses and Cisco DNA software subscription licenses are required at the time of purchase and are available in three license level options: Cisco DNA Premier, Cisco DNA Advantage, and Cisco DNA Essentials.

Network Stack, Network Advantage, or Network Essentials licenses are included with the hardware, while a Cisco DNA Software subscription license must be selected when ordering. Cisco DNA includes software support.

Cisco Catalyst 9300 Series Switches ship with the following predefined components and accessories:

  • Switch

  • Default power supply (based on the selected switch)

  • Secondary power supply (same as default primary)

  • 2 power cables (you need to select a specific power cable)

  • Stackable kit (only for SKU C9300L with 50cm stackable cable)

  • Stack cable (50cm) if not selected (only for SKU C9300)

  • StackPower cable (30 cm) if not selected (only for SKU C9300) - Mounting brackets.

Software-Defined Access (SD-Access) enables automation based on edge-to-cloud policies, with core functionality leveraging controller-based architecture, including validated design patterns, simplified device deployment, management unified cabling and wireless, network virtualization with segmentation, Group-Based Policy, and contextual analytics.

SD-Access can be enabled on the Cisco DNA Advantage or Cisco DNA Premier Software offering. With Cisco DNA Advantage, customers will need to purchase Cisco Identity Services Engine (ISE) separately, while for Cisco DNA Premier, ISE is built into functionality.

What is the router in Cisco Packet Tracer?

The Cisco Systems simulation tool allows users to create network topologies and mimic modern computer networks. The software allows users to simulate the configuration of Cisco routers and switches.

  1. Click on the router to display the configuration menu and verify that it is turned on.

  2. Next, open the Ethernet ports to allow communication. Although physically connected, they are in a state known as "shut down administrative".

  3. Click on the CLI tab to access the configuration menu.

If you are familiar with Cisco IOS, you will know it works the same way.

  1. Press enter to start the session

  2. Type enable to enter privileged mode (this gives you more options in router configuration)

  3. Config terminal (or config t for short) to access the configuration menu.

  4. Interface fastethernet0 / 0 to access Ethernet0 / 0

  5. The IP address assigns an IP address and subnet mask to the interface.

  6. "no shutdown" to open the business interface.

An interesting router is undoubted "Cisco Small Business SPA122 ATA" with VoIP Router and Adapter

Despite being inexpensive and small in size, it packs the quality of Cisco. It has two VoIP telephone lines that can also be used with different operators. It can be connected directly to the ADSL line as it is equipped with a modem.

At first glance, you may be surprised by the multitude of parameters that can be set, but since the main parameters to be set are few, it is easy to learn. It is important to make sure that the internet provider

do not apply filters to prevent VoIP communication.

What is a Firewall in Cisco Packet Tracer

Firewalls establish a barrier between secure and controlled internal networks and verify that external networks are trusted.

In Packet Tracer, you create a corporate network divided into two subnets, one internal inaccessible from the outside and one "free" with a web server that offers services accessible from the outside.

  • Use the ISP infrastructure provided previously (simulation of an ISP) and create two local subnets, the internal one consisting of a client and the DMZ consisting of a server.

Both will be switch-based networks with private class C addresses.

  • The corporate network will be connected to the router provided by the ISP through a firewall.

Then configure the firewall so that:

  • from the WAN and the LAN, it is possible to access the web server in the DMZ

  • from the LAN and the DMZ, it is possible to use the services offered by the ISP

  • access to the LAN by the DMZ and the WAN is not allowed


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