1.5.3.6 Packet Tracer – Communicating in a Cyber World Answers

1.5.3.6 Packet Tracer – Communicating in a Cyber World Answers

Packet Tracer – Communicating in a Cyber World (Answers Version)

Answers Note: Red font color or gray highlights indicate text that appears in the Answers copy only.

Addressing Table

Device Private IP Address Public IP Address Subnet Mask Site
FTP/Web Server 10.44.1.254 209.165.201.3 255.255.255.0 Metropolis Bank HQ
Email/DNS Server 10.44.1.253 209.165.201.4 255.255.255.0 Metropolis Bank HQ
NTP/AAA Server 10.44.1.252 209.165.201.5 255.255.255.0 Metropolis Bank HQ
File Backup Server 10.44.2.254 N/A 255.255.255.0 Gotham Healthcare Branch

Objectives

Part 1: Send Email between Users

Part 2: Upload and Download Files using FTP

Part 3: Remotely Access an Enterprise Router using Telnet

Part 4: Remotely Access an Enterprise Router using SSH

Background

In this activity, you will communicate across remote networks using common network services. The IP addressing, network configuration, and service configurations are already complete. You will use the client devices in the differing geographic regions to connect to both servers and other client devices.

Part 1: Send Email between Users

Step 1: Access the email client on Mike’s PC.

  1. Click the Gotham Healthcare Branch site and then click the PC Mike.
  2. Click the Desktop tab and then click Email.

Step 2: Send an email to Sally.

  1. Create an email by clicking the Compose button.
  2. In the To: field, enter the email sally@cisco.corp
    In the Subject: field, enter the string of text “Urgent- Call me”.
    In the Message section, enter. “Call me when you are free today to discuss the new sale.
  3. Click the Send button to transmit the email.
    What protocol was used to send the email to the email server?____________________________________________________________________________________
    STMTP

Step 3: Have Sally check her email.

  1. Enter the Metropolis Bank HQ site and then click the PC Sally.
  2. Click the Desktop tab and then click Email.
  3. Click the Receive button to retrieve the email sent from Mike.
    What protocol was used to retrieve the email from the email server?____________________________________________________________________________________
    POP

Part 2: Upload Files using FTP

Step 1: Set the packet sniffer to capture traffic on the correct port.

  1. Enter the geographic (root) view to see all three remote sites.
  2. Click the Cyber Criminals Sniffer.
  3. Click Port1 to capture packets on this port.
  4. Leave the Cyber Criminal Sniffer open and visible for the rest of this part.

Step 2: Remotely connect to the FTP server.

  1. Enter the Healthcare at Home site and then click the PC Mary.
  2. Click the Desktop tab and then click Command Prompt.
  3. Connect to the FTP/Web server at Metropolis Bank HQ by entering ftp 209.165.201.3 in the command prompt.
  4. Enter the username of mary and a password of cisco123.

Step 3: Upload a file to the FTP server.

  1. At the ftp> prompt, enter the command dir to view the current files stored on the remote FTP server.
  2. Mary has a file containing sensitive information regarding new healthcare client information.
    Upload the newclients.txt file to the FTP server by entering the command put newclients.txt.
  3. At the ftp> prompt, enter the command dir and verify the newclients.txt file is now on the FTP server.
    Why is FTP considered an insecure protocol for moving files?____________________________________________________________________________________
    FTP does not provide encryption and all data is sent in clear text.

Step 4: Analyze the FTP traffic.

  1. Enter the geographic (root) view to see all three remote sites.
  2. Click the Cyber Criminals Sniffer.
  3. Under the GUI tab on the left, click the 1st FTP packet available to select it. Then scroll down to the bottom of the window displayed on the right.
    What information is displayed in clear text from the FTP header?____________________________________________________________________________________
    The username used by the client to connect to the FTP server.
  4. On the left, click the 2nd FTP packet available to select it. Then scroll down to the bottom of the window displayed on the right. Do this again for the 3rd FTP packet.
  5. Besides the username, what other sensitive information is displayed in clear text from the FTP header?____________________________________________________________________________________
    The password used by the client to connect to the FTP server.

Part 3: Remotely Access an Enterprise Router Using Telnet

Step 1: Remotely connect to an enterprise router.

  1. Enter the Healthcare at Home site and then click on the PC Dave.
  2. Click the Desktop tab and then click Command Prompt.
  3. Ping the enterprise router using the command ping 209.165.201.2 to verify reachability.
  4. Use the command telnet 209.165.201.2 to telnet to the IP address of the enterprise router.
  5. Authenticate to the enterprise router with the username of admin and the password of cisco123.
  6. Use the command show users to view the active Telnet connection to the enterprise router.
    Why is Telnet considered an insecure protocol for remotely managing a device?____________________________________________________________________________________
    Telnet does not provide encryption and all data is sent in clear text.

Part 4: Remotely Access an Enterprise Router Using SSH

Step 1: Remotely connect to an enterprise router.

  1. Enter the Gotham Healthcare Branch site and then click the PC Tim.
  2. Click the Desktop tab and then click Command Prompt.
  3. Ping the enterprise router using the command ping 209.165.201.2 to verify reachability.
  4. Use the command ssh -l admin 209.165.201.2 to SSH to the IP address of the enterprise router.
  5. Authenticate to the enterprise router with the password of cisco123.
  6. Use the command show users to view the active SSH connection to the enterprise router.
    Why is SSH considered a secure protocol for remotely managing a device?____________________________________________________________________________________
    SSH provides encryption and all data is sent in a secure format.
  7. Enter the global configuration mode using configure terminal command.
  8. Create an enable secret password of cisco with the command enable secret cisco.

Suggested Scoring Rubric

Activity Section Question Location Possible Points Earned Points
Part 1: Send email between users Step 2 2
Step 3 2
Part 2: Upload and download files using FTP Step 2 2
Step 3d 2
Step 3f 2
Part 3: Remotely access an enterprise router using telnet Step 1 2
Part 4: Remotely access an enterprise router using SSH Step 1 2
Questions 14
Packet Tracer Score 86
Total Score 100

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