Networktraining
21
stories in this section
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VLANs and Trunking Explained
What is a VLAN? It is a logical, software-based segmentation of a physical network, so devices on shared switches behave as separate networks and reach each other only through routing. A trunk carries several VLANs over one link by tagging frames, and a router or Layer 3 switch joins them. The sections below follow that…
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Project Management and ITIL Certifications for IT
ITIL 4 Foundation exam preparation suits most people at 20 to 40 hours of study over 2 to 4 weeks, followed by a 40-question multiple-choice exam. Picture a service desk analyst told to get ITIL certified, with no framework background and no spare month. The route is short: learn the syllabus structure, take an official-style…
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Ethernet and MAC Addresses
What is a MAC address? It is a unique identifier that a manufacturer assigns to a network interface controller (NIC). It is 48 bits long and identifies a device on the local network, not across the internet. A laptop is plugged into an office switch, and a colleague asks which address the switch reads when…
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OSI Model Explained
The 7 layers of the OSI model, from bottom to top, are Physical, Data Link, Network, Transport, Session, Presentation and Application. Each layer handles one job in moving data between devices, and the layers work together rather than one after another. This guide follows a single web request through the stack. For exam context, see…
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Firewalls Explained
A new service is running, yet outside visitors cannot reach it. What is a firewall in that situation? It is a rule-based filter between networks or on a host, and its rules decide which traffic passes. The quick answer is that a firewall compares each packet with an ordered list of rules and applies the…
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Security Logging and SIEM Basics
Reader situation Where to start Planning use New to SIEM Collect, correlate, alert, store Learn how a raw event becomes an alert before opening any product. Mapping log sources Network devices, security devices, servers, applications, cloud List what can export logs, then add sources gradually because some vendors charge per data source. Practising log analysis…
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Phishing and Social Engineering Basics
So what is social engineering in cyber security? It is the art of manipulating people into giving up confidential information, by exploiting emotions such as fear, uncertainty and trust. Verifying any unexpected request independently is the core defence. The sections below follow an attack from first contact to the final request, then compare email, phone,…
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Cisco Certification Paths Beyond CCNA
Level Credential and exam structure Planning use Entry CCST, the foundational credential for entry-level IT roles Suits people with no networking background who want a first Cisco credential before CCNA. Associate CCNA, earned by passing a single exam, 200-301 The standard starting point for network roles and the base for every higher Cisco level. Professional…
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Switches vs Routers vs Hubs
Device Forwards on Collision domains Broadcast domains Planning use Hub Nothing; repeats every signal out of every other port Whole device is a single shared domain Single domain, shared with everything attached Only for learning or legacy gear; a switch replaces it Switch Destination MAC address (data link layer) Each port is its own domain…
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Latestsportsbuzz fitness training: a step-by-step guide
The phrase latestsportsbuzz fitness training points to a reader who wants to connect a sports news brand with practical training. The brand is a sports news and commentary site with the tagline “Experience the Unpredictable in Sports”. This guide covers the task behind the search: turning what you read about athletes and events into a…