Troubleshooting Network Configurations: OSPF, RADIUS, ACLs

Posted by on Mar 3, 2025 in Computers | 0 comments

Network Configuration Issues and Solutions

This document addresses various network configuration issues and provides solutions. The topics covered include OSPF, RADIUS, Access Control Lists (ACLs), Virtual Switching Framework (VSF), and more.

OSPF Configuration

  • Configure Area 1 as a stub area, with no summaries on Switch-2.
  • Set a cost of 100 in the redistribute static command on Switch-1 to change the external LSA metric.
  • Enable BFD in asynchronous mode on each OSPF routing switch in VLAN 100.
  • Use virtual
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Understanding Usenet, IRC, VoIP, Skype, Blogs, and RSS

Posted by on Mar 2, 2025 in Computers | 0 comments

Understanding Internet Communication Technologies

Usenet: The Global Bulletin Board

Usenet is a global discussion area with millions of messages organized into newsgroups. Anyone can participate in these discussions, which are hosted on many computers across the internet.

Types of Newsgroups:

  • Moderated Newsgroups: A moderator reviews messages and decides which ones to post.
  • Unmoderated Newsgroups: All messages are posted directly to the server and published in the newsgroup.

A newsgroup reader is software

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Computer Hardware, Software, and Networking Essentials

Posted by on Mar 2, 2025 in Computers | 0 comments

Computer: It is an electronic machine that receives and processes data to convert it. A computer is a collection of integrated circuits and related components that can execute with accuracy, speed, and according to what is indicated by the user or automatically by another program, a variety of sequences of instructions or routines that are ordered, organized, and systematized in a wide range of practical applications and precisely determined. This process has been called programming, and the person

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Fundamental C Programming Concepts

Posted by on Mar 1, 2025 in Computers | 0 comments

Here’s a brief explanation for each topic:

1. Modular Programming, Top-Down and Bottom-Up Approaches

Modular Programming: Involves dividing a program into smaller, manageable modules or functions, each performing a specific task. This promotes code reusability, readability, and easier debugging.

Top-Down Approach: The problem is broken down into smaller sub-problems, starting from the highest level of abstraction. Each sub-problem is solved step by step.

Bottom-Up Approach: In contrast to the top-down

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Server Administration: Essential Tasks and Configuration

Posted by on Mar 1, 2025 in Computers | 0 comments

Creating a Domain

Server Manager: Add Roles and Features, Active Directory Domain Services.

Adding a Computer to the Domain

Steps:

  1. Control Panel
  2. System
  3. Change Settings
  4. Computer Name: Change
  5. Member of: Input domain

Creating Local and Domain Accounts

Domain Accounts

Steps:

  1. Control Panel
  2. System
  3. Administrative Tools
  4. AD Users and Computers
  5. Right-click, New User, and create the user
  6. Right-click on the user created, Add to group, Find now
  7. Click on the group to add

Local Accounts

Steps:

  1. Login to local host
  2. System
  3. Administrative
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Data Link Layer Communication Protocols and Cabling

Posted by on Feb 28, 2025 in Computers | 0 comments

Link Layer

Protocols

  • Contention-Based Protocols

    Strife (Pure and Slotted ALOHA): Stations compete for transmission time. Pure ALOHA is optimal for low traffic (18.4% efficiency), while Slotted ALOHA improves efficiency to 36.8% by synchronizing transmissions into time slots.

    CSMA (Carrier Sense Multiple Access): Transmission is delayed if the medium is busy. Variations include:

    • 1-persistent CSMA: Wait until the medium is free (optimal for low, continuous traffic).
    • Non-persistent CSMA: Wait a random
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