Questions and Answers
What does Cisco IOS stand for?
Which internal component is NOT part of a network device?
What interface does the Cisco IOS software utilize?
Which of the following storage types loses its content when the router is powered down?
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What is the primary purpose of ROM in a router's memory architecture?
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Which method is NOT listed as a way to access the router environment?
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Which type of memory retains its content when the router is powered down?
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What is the role of NVRAM in the router's memory structure?
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What command is used to copy the running configuration to the startup configuration?
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Which configuration file is lost if the router loses power?
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What is the purpose of the startup-config file?
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Which command would you use to view the current running configuration on a router?
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If changes are made to a router's configuration, what must be done to ensure those changes are persistent after a reboot?
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Study Notes
Module Overview
- Module Code: IT2050, Name: Computer Networks, Title: Introduction to Routers, Lecturer: Hansika Mahaadikara
- Delivery: 2hr lecture, 1hr tutorial, 2hr practical (bi-weekly)
- Assessment: Continuous Assessments (40%), Final Exam (60%)
- Online Practical Exam 1: 10% (Week 5)
- Online Practical Exam 2: 10% (Week 12)
- Mid Online: 20% (Week 8)
Network Devices
- Internal components include CPU, RAM, ROM, Flash memory, NVRAM, and Power Supply.
- Each component plays a crucial role in the functionality of network devices.
Cisco IOS Software
- Operating system is known as Cisco Internetwork Operating System (Cisco IOS).
- Essential for the operation of network devices.
Command Line Interface (CLI)
- Cisco IOS utilizes a CLI for device management.
- Access methods include console connections, AUX port, and Telnet.
Router Memory Types
-
RAM:
- Stores running configuration files.
- Data lost upon power down.
-
ROM:
- Stores bootable IOS image and bootstrap programs.
-
NVRAM:
- Saves startup configuration files.
- Retains data when powered off.
-
Flash Memory:
- Holds full IOS image.
- Retains data when powered down; is energetically erasable.
Router Configuration Management
- Configuration files can be displayed using:
-
show running-config -
show startup-config
-
-
Copy Command:
- Used to copy configuration files among RAM, NVRAM, and TFTP server.
- Command example:
copy running-config startup-config
Saving Configurations
- To prevent data loss on power failure:
- Use
copy running-config startup-configto save changes from RAM to NVRAM.
- Use
- Upon booting, configurations load from NVRAM to RAM.
Bootup Process
- Involves startup configuration, bootable IOS, and running configuration.
- Proper management ensures accurate router behavior post-reboot.
Example Command Usage
- To reflect configuration changes:
-
Router# copy running-config startup-config - Confirmation to maintain startup config with current running config is needed.
-
Key Configuration File Insights
- Modifications include various settings that will persist across sessions or upon reboot.
- Ensure familiarity with proper command syntax and the implications of configuration changes.
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Description
This quiz focuses on Lecture 01 of the IT2050 module, which introduces the fundamental concepts of routers in computer networks. Students will explore essential topics discussed by the lecturer, Mr. Dhammika De Silva, and prepare for upcoming tutorials and practical sessions.
