Hairpin NAT
Hairpin NAT allows internal clients to reach an internal service through its public address using appropriate address translation.
View definitionIT Dictionary
Clear, practical definitions to understand network, security, systems and IT vocabulary.
Filter by topic 63 topics
All topics
3CX 3
Active Directory 26
AI & Data 19
Applications & API 3
Backup 52
Backup & Security 10
Cloud 22
Cloud & DevOps 21
Cloud & Linux 23
Cybersecurity 93
DNS 3
Email 17
FortiGate 40
Hardware 21
IA & Data 3
Identity & API 2
Identity & Directory 15
Identity & SaaS 1
IT & Operations 7
Linux 70
Microsoft 365 84
Monitoring 2
Monitoring & ITSM 21
Networking 101
Networking & Datacenter 1
Networking & DNS 11
Networking & Ethernet 1
Networking & IPv6 4
Networking & Monitoring 1
Networking & Multicast 1
Networking & Routing 4
Networking & Security 4
Networking & Switching 4
Networking & VLAN 2
Networking & Wi-Fi 8
Networking / VPN 1
PKI & Certificates 7
Security 16
Servers 39
SSL / PKI 5
Storage 37
Storage & Authentication 1
Storage & Linux 1
Storage & Virtualization 2
Telephony 10
Telephony & VoIP 18
Virtualization 59
Virtualization & Storage 10
VMware 2
VPN & IPsec 2
Web 6
Web & Data 31
Web & Development 8
Web & Networking 3
Web & Security 2
Web & WordPress 16
Windows 46
Windows & Hardware 1
Windows & Identity 1
Windows & Security 2
Windows & Storage 2
Windows Server 5
WordPress 14
37matching definitions · 1,058 in the dictionary
Clear filters
Hardened Repository
A strengthened backup repository against malicious deletion or modification.
View definitionHardware Virtualization
Hardware virtualization uses processor features to let a hypervisor run isolated virtual machines efficiently.
View definitionHashing
Understand cryptographic hashes, integrity checks and password hashing, including why a digest is not encrypted data.
View definitionHEAD Method HTTP
The HTTP HEAD method retrieves response headers equivalent to GET without transferring the response body.
View definitionHealth Check SD-WAN
A probe that measures availability, latency, loss and gigue of a link WAN.
View definitionHelm
A package manager for Kubernetes based on configurable charts.
View definitionHierarchical Escalation
Hierarchical escalation alerts management when an incident's priority, risk, or resolution time requires higher-level decisions.
View definitionHigh Availability
High Availability (HA) keeps an IT service accessible through selected failures using redundancy, health monitoring and failover to a working resource...
View definitionHigh-Watermark Vector
Active Directory replication metadata that records the highest USN already received from a partner for a given partition
View definitionHOTP
A one-time code based on a shared counter rather than time.
View definitionHSRP
A red-Dandon bridge protocol
View definitionHSTS
HSTS requires the browser to use HTTPS for a specified time
View definitionHTTP
The protocol used to exchange resources between a web client and a server.
View definitionHTTP Cache
HTTP caching stores reusable responses according to cache headers, validators, and freshness rules.
View definitionHTTP Header
An HTTP header is a field carrying metadata about a request or response, such as content type or caching rules.
View definitionHTTP Keep-Alive
HTTP keep-alive reuses a network connection for multiple requests instead of opening a connection each time.
View definitionHTTP Method
An HTTP method identifies the requested operation on a resource, such as GET, POST, PUT, PATCH, or DELETE.
View definitionHTTP Persistent Connection
An HTTP persistent connection handles multiple requests over one transport connection to reduce connection overhead.
View definitionHTTP Range Request
An HTTP range request retrieves selected byte segments of a resource, useful for downloads and media seeking.
View definitionHTTP Request
An HTTP request specifies a method, target resource, headers, and optionally a body sent by a client.
View definitionHTTP Response
An HTTP response carries a status code, headers, and optionally a representation body returned by a server.
View definitionHTTP Status Code
An HTTP status code is a three-digit result indicating whether a request succeeded, redirected, or encountered an error.
View definitionHTTP/3
HTTP/3 is a version of HTTP using QUIC in place of TCP.
View definition