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Transport Layer Security (TLS) is a cryptographic protocol designed to provide communications security over a computer network. The protocol is widely used in applications such as email, instant messaging, and voice over IP, but its use in securing HTTPS remains the most publicly visible.
UK Visas and Immigration. UK Visas and Immigration ( UKVI) is a division of the Home Office responsible for the United Kingdom's visa system. It was formed in 2013 from the section of the UK Border Agency that had administered the visa system.
Server Name Indication ( SNI) is an extension to the Transport Layer Security (TLS) computer networking protocol by which a client indicates which hostname it is attempting to connect to at the start of the handshaking process. [ 1] The extension allows a server to present one of multiple possible certificates on the same IP address and TCP ...
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Visa requirements for British citizens are administrative entry restrictions by the authorities of other states placed on citizens of the United Kingdom . As of 2024, British citizens had visa-free or visa on arrival access to 192 countries and territories, ranking the British passport 4th in the world according to the Henley Passport Index.
The United Kingdom Electronic Travel Authorisation ( ETA) is an advance travel permission required from foreign nationals who intend to visit or transit the United Kingdom without a visa. [ 1] The system, as part of the Nationality and Borders Act 2022, operates using an online application whose information is checked against security databases.
A list of the top-level domains by the Internet Assigned Numbers Authority (IANA) is maintained at the Root Zone Database. [ 1 ] IANA also oversees the approval process for new proposed top-level domains for ICANN. As of April 2021, their root domain contains 1502 top-level domains. [ 2 ][ 3 ] As of March 2021, the IANA root database includes ...
TACACS Login Host protocol. [32] TACACS+, still in draft which is an improved but distinct version of TACACS, only uses TCP 49. [33] 50: Assigned: re-mail-ck (Remote Mail Checking Protocol) [3] 51: Reserved: Historically used for Interface Message Processor logical address management, [34] entry has been removed by IANA on 2013-05-25 52: Assigned