IT Index Archive - 探花大神 /it-index Daily insights on directory services, IAM, LDAP, identity security, SSO, system management (Mac, Windows, Linux), networking, and the cloud. Mon, 21 Jul 2025 18:57:05 +0000 en-US hourly 1 https://wordpress.org/?v=6.8.1 What is a Process? /it-index/what-is-a-process Fri, 18 Jul 2025 21:10:01 +0000 /?post_type=it-index&p=127861 Learn the fundamentals of processes in operating systems. Discover how processes work, their key features, and essential concepts for IT professionals.

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]]> What is a System Call? /it-index/what-is-a-system-call Fri, 18 Jul 2025 21:08:54 +0000 /?post_type=it-index&p=127859 Learn how system calls bridge user applications and the OS kernel. Understand user mode, kernel mode, and the technical mechanisms behind system calls.

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]]> What is an Operating System (OS)? /it-index/what-is-an-operating-system-os Fri, 18 Jul 2025 21:04:45 +0000 /?post_type=it-index&p=127857 Discover what an operating system (OS) is, its core components like the kernel and user interface, and how it manages resources, processes, and security for all computing devices.

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]]> What is Disk Imaging? /it-index/what-is-disk-imaging Fri, 18 Jul 2025 20:58:03 +0000 /?post_type=it-index&p=127855 Learn disk imaging fundamentals: bit-by-bit copying, forensic applications, deployment strategies, and key differences from disk cloning.

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]]> What is a Boot Record? /it-index/what-is-a-boot-record Fri, 18 Jul 2025 20:54:34 +0000 /?post_type=it-index&p=127853 Learn how boot records work in computer systems. Understand MBR, VBR, and boot processes for effective IT management and troubleshooting.

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]]> What is S/MIME (Secure Multipurpose Internet Mail Extensions)? /it-index/what-is-s-mime-secure-multipurpose-internet-mail-extensions Fri, 18 Jul 2025 20:53:47 +0000 /?post_type=it-index&p=127851 Learn how S/MIME provides email encryption, digital signatures, and PKI-based security for enterprise communications. Complete technical guide.

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]]> What is a Jumbo Frame? /it-index/what-is-a-jumbo-frame Fri, 18 Jul 2025 20:52:46 +0000 /?post_type=it-index&p=127849 Learn how Jumbo Frames improve network performance, their key benefits, implementation requirements, and when they're most effective in data centers.

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]]> What is PGP (Pretty Good Privacy)? /it-index/what-is-pgp-pretty-good-privacy Fri, 18 Jul 2025 20:52:00 +0000 /?post_type=it-index&p=127847 Learn how PGP encryption works, its hybrid cryptosystem, digital signatures, and key management. Complete guide for IT professionals and security teams.

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]]> What is Full Cone NAT? /it-index/what-is-full-cone-nat Fri, 18 Jul 2025 20:50:05 +0000 /?post_type=it-index&p=127845 Learn how Full Cone NAT works, its key features, and use cases for P2P applications. Complete technical guide for network administrators.

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]]> What is Hairpinning NAT? /it-index/what-is-hairpinning-nat Fri, 18 Jul 2025 20:34:20 +0000 /?post_type=it-index&p=127843 Learn how Hairpinning NAT enables internal devices to communicate using external IP addresses. Technical guide for network administrators.

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]]> What is a NAT Gateway? /it-index/what-is-a-nat-gateway Fri, 18 Jul 2025 20:33:32 +0000 /?post_type=it-index&p=127841 Learn how NAT Gateway enables secure outbound connectivity for private cloud resources. Complete technical guide covering features, setup, and use cases.

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]]> What is NAT Traversal? /it-index/what-is-nat-traversal Fri, 18 Jul 2025 20:32:21 +0000 /?post_type=it-index&p=127839 Learn NAT traversal techniques including STUN, TURN, and hole punching. Essential guide for network engineers enabling P2P communication across NAT.

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