CDN — Content Delivery Network شبكة توصيل المحتوى (CDN)
A worldwide fleet of edge servers that cache your static files — images, CSS, JS, video — and serve each visitor from th...
搜索 80 个技术术语,由运营该平台的工程师用通俗的中阿双语为您解释。
A worldwide fleet of edge servers that cache your static files — images, CSS, JS, video — and serve each visitor from th...
The structured store behind every dynamic website — users, products, posts and settings all live in one. Relational data...
The internet's phone book — the distributed system that translates human-readable names (hostrena.com) into the IP addre...
The human-readable address of a website — hostrena.com instead of a numeric IP address. A domain is rented yearly from a...
A service that runs professional mailboxes on your own domain — [email protected] instead of a generic free address. P...
The encryption protocol securing traffic between browsers and servers — what puts the padlock and https:// in the addres...
A virtual machine carved out of a physical server through virtualization (typically KVM). Each VPS gets a guaranteed sli...
The world's most deployed open-source relational database and the default engine of the hosting universe — WordPress, Jo...
Non-Volatile Memory Express — the storage protocol that connects flash drives straight to the CPU over PCIe lanes, bypas...
An automatic charge that renews your subscription each cycle — monthly or yearly — using a saved payment method. It is w...
The DNS record that tells the world which servers receive email for your domain. Each MX entry carries a priority number...
Moving a domain from one registrar to another — unlock the domain, request its EPP authorization code, approve the trans...
The published rules for getting money back — which services qualify, within what window, and in what form (original paym...
A DNS TXT record listing which servers are allowed to send email for your domain. Receiving servers check the connecting...
Distributed Denial of Service — flooding a target with traffic from thousands of hijacked machines until legitimate user...
The percentage of time a server or service is reachable and working. The numbers compound fast: 99.9% allows ~8.7 hours...
The itemized bill for your services — what was charged, for which period, at what price, plus any taxes. In hosting plat...
A hosting model where many websites live on one physical server and share its CPU, RAM and disk. It is the cheapest way...
The most fundamental DNS record: it maps a hostname directly to an IPv4 address (example.com → 203.0.113.10). Its IPv6 t...
Storing computed results so the next request skips the work. The web stacks caches in layers: browser cache, CDN edge ca...
HTTP wrapped in TLS encryption — the secure version of the web's transfer protocol, running on port 443. It guarantees t...
Charging only for the fraction of the billing period you actually use. Upgrade a plan mid-month and you pay the price di...
Simple Mail Transfer Protocol — the protocol that sends email between servers and from your app or mail client to the ou...
Structured Query Language — the standard language for talking to relational databases: SELECT reads, INSERT adds, UPDATE...
The suffix after the last dot in a domain — .com, .net, .org, .sa, .io. Generic TLDs (.com) are open to anyone; country-...
A DNS alias: it points one hostname at another hostname instead of an IP (www.example.com → example.com). When the targe...
Internet Message Access Protocol — the modern way to read mail. Messages stay on the server; every device (phone, laptop...
The non-profit certificate authority that made HTTPS free for everyone. It issues domain-validated TLS certificates thro...
A prefix that creates a separate site space under your main domain — blog.example.com or app.example.com. Subdomains are...
A virtual server whose CPU cores are pinned to it physically — no sharing, no fair-use scheduling. Where a VPS shares ho...
An entire physical machine rented by one customer — every core, every gigabyte of RAM and every disk belongs to you alon...
A high-performance web server that drop-in replaces Apache (it reads .htaccess) while serving far more concurrent traffi...
The community fork of MySQL, created by MySQL's original author after the Oracle acquisition. It is a drop-in replacemen...
The licensed service that moves money between your card and the merchant — encrypting card data, talking to banks, handl...
Post Office Protocol v3 — the older mail retrieval protocol that downloads messages to one device and (by default) delet...
The public directory of domain registrations — who registered a domain, through which registrar, when it expires and whi...
A single certificate that covers a domain AND all its first-level subdomains — *.example.com secures www, app, mail and...
Hosting that runs on a pool of interconnected servers instead of a single machine. Resources scale up or down on demand,...
The gatekeeper that filters network traffic by rules — which ports are open, which IPs may connect, which packets get dr...
The newest version of the web's transfer protocol, built on QUIC over UDP instead of TCP. It removes head-of-line blocki...
The most advanced open-source relational database — strict standards compliance, rich types (JSON, arrays, geospatial vi...
A free-form DNS record that stores text against a hostname. In practice it powers the internet's verification layer: SPF...
The web interface that manages a hosting account without touching the command line — creating email accounts, databases,...
A cryptographic signature your mail server adds to every outgoing message, verifiable against a public key published in...
The secret authorization key (also called auth code or transfer code) that proves you own a domain when transferring it...
On-the-fly compression of text responses — HTML, CSS, JS, JSON — before they cross the wire. Gzip is the universal veter...
The server that answers DNS queries for your domain — the authoritative source of its records. Setting a domain's namese...
The classic web interface for managing MySQL and MariaDB — browse tables, run queries, edit rows, import and export dump...
Compensation issued as balance on your account instead of cash — the standard remedy when a provider breaches its SLA. A...
A firewall that understands HTTP — it inspects requests at the application layer and blocks attack patterns a network fi...
The setting that re-purchases a service automatically at the end of its term. For domains it is genuinely protective — a...
The policy layer on top of SPF and DKIM: a DNS record that tells receivers what to do when authentication fails — monito...
A registrar service that replaces your name, email and phone in the public WHOIS record with proxy contact details. With...
PHP's built-in opcode cache: it keeps the compiled form of your scripts in shared memory, so each request skips re-parsi...
An in-memory key-value store famous for sub-millisecond reads — the standard engine for caching, sessions, queues and re...
How long (in seconds) resolvers may cache a DNS record before asking again. A 3600 TTL means changes take up to an hour...
Guessing credentials by trying thousands of combinations against a login — SSH, WordPress admin, email, FTP. Defenses ar...
A lookup structure (usually a B-tree) that lets the database find rows without scanning the whole table — the difference...
The waiting period after changing DNS records while resolvers worldwide expire their cached copies and fetch the new val...
The buffer after a missed renewal during which the service still works (or can be restored at no penalty). Domains typic...
A traffic director that spreads incoming requests across multiple servers — by round-robin, least-connections or respons...
The accredited company that sells and manages domain registrations on your behalf, reporting to the registry that owns e...
The contractual promise a provider makes about service quality — most importantly the guaranteed uptime percentage. If t...
Reading and sending mail through a browser instead of a desktop or mobile client — Roundcube and SnappyMail are the comm...
A routing technique where the same nameserver IP is announced from many locations worldwide, and each query is answered...
The volume of data your server can transfer in a billing period, measured in GB or TB. Every page view, download and ema...
The rule set a database uses to compare and sort text — whether "a" equals "A", how accents rank, and how Arabic letters...
Registering a domain and pointing it at a placeholder page instead of a live site — to reserve a brand name, hold an ass...
A rule that redirects mail from one address to another — [email protected] forwarding to your personal inbox, with no...
The delay between asking and receiving — measured in milliseconds, dominated by physical distance and the speed of light...
Usage beyond your plan's included quota — extra bandwidth, storage or compute hours. Providers handle it three ways: har...
Requiring a second proof beyond the password — a rotating code from an authenticator app, a hardware key, or a one-time...
Prepaid balance sitting on your hosting account, consumed automatically by future invoices before any card is charged. I...
A mailbox configured to receive mail sent to ANY non-existent address at your domain — [email protected], oldemployee@...
Google's three user-experience metrics that feed directly into search ranking: LCP (Largest Contentful Paint — main cont...
Mathematically scrambling data so only key holders can read it. In hosting it appears in two forms: encryption in transi...
A domain written in non-Latin script — Arabic, Chinese, Cyrillic — like موقع.السعودية. Under the hood, browsers convert...
Continuously copying a database to one or more replica servers. Replicas serve read traffic (scaling), stand by as failo...
A hosting plan designed to be re-sold: you buy a large allocation of disk and bandwidth, split it into smaller branded a...
The mirror image of a normal lookup: a PTR record maps an IP address back to a hostname. Its killer use case is email de...
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