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Server Message Block (SMB) Protocol: A Complete Guide
The Server Message Block (SMB) protocol enables hosts to share files, directories, printers, and other resources across a network as if those resources were local. It is a request-response protocol that operates at the Application layer, using TCP port 445 for direct communication. Every message in the SMB protocol follows a standard structure: a fixed-size...
Email Protocols: SMTP, POP3, and IMAP
Email is one of the primary services running on the internet. The email server stores email messages in a database, and email uses a store-and-forward method for sending and holding messages. Email clients communicate with servers running mail services to send and receive email, and the client-connected server in turn communicates with other mail servers...
In-Band and Out-of-Band Network Management: A Complete Guide
Network management is critical for businesses, IT teams, and CCNA students learning the fundamentals of how networks are administered. Two fundamental approaches — in-band and out-of-band (OOB) management — determine how administrators monitor, configure, and troubleshoot devices. Understanding when to use each method, how to configure them on Cisco IOS, and how they relate to...
Ethernet Standards Explained: From 10 Mbps to 400 Gbps
Ethernet has been the dominant wired LAN technology for decades, and it’s kept that position by continuously scaling to meet new bandwidth demands rather than being displaced by a competing technology. This guide walks through the major Ethernet standards, from the original 10 Mbps specification through today’s 400 Gigabit Ethernet, what cabling each one needs,...
Network Devices: Hubs, Switches, Routers, and More Explained
Network devices are the unsung hardware behind every connection you make. From streaming video to running enterprise infrastructure, they keep data moving, secure, and reliable. Whether you’re studying for CCNA or building out real infrastructure, understanding what each device actually does, and where it fits, is foundational. This guide covers the core network devices, hubs,...
ہواوے سمارٹ فون استعمال کرنے والوں کیلئے بری خبر
Huawei shipped 1.14 million 5G base stations globally before US sanctions forced a complete silicon redesign of its carrier-grade portfolio. That number — drawn from the company’s own 2025 annual report filings — captures the paradox at the center of any serious discussion about the Chinese networking giant. It is simultaneously the most sanctioned technology...
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