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Service in the Internet Protocol Suite
The Echo Protocol is a service in the Internet Protocol Suite defined in 1983 in RFC 862 by Jon Postel. It was originally proposed as a way to test and
Echo_Protocol
Network utility used to test the reachability of a host
Control Message Protocol (ICMP) packets. Pinging involves sending an ICMP echo request to the target host and waiting for an ICMP echo reply. The program
Ping_(networking_utility)
to a node. Adaptive Echo, Full Echo, and Half Echo can be chosen as several modes of the encrypted Echo protocol. The Echo protocol offers three modes
Echo (communications protocol)
Echo_(communications_protocol)
Computer networking protocol suite
and including support for searching. The AppleTalk Echo Protocol (AEP) was a transport layer protocol designed to test the reachability of network nodes
AppleTalk
WireGuard AppleTalk DECnet IPX/SPX Internet Protocol Suite OSI protocols Xerox Network Systems AEP AppleTalk Echo Protocol AH Authentication Header over IP or
List of network protocols (OSI model)
List_of_network_protocols_(OSI_model)
Internet protocol that provides the quote of the day
with ping and traceroute, which are more robust adaptations of the echo protocol (RFC 862), which predated the attempt at QOTD standardization. Graham
QOTD
Internet protocol used for error messages in network operations
implemented using the ICMP echo request and echo reply messages. ICMP uses the basic support of IP as if it were a higher-level protocol; however, ICMP is actually
Internet Control Message Protocol
Internet_Control_Message_Protocol
Topics referred to by the same term
Look up Echo, echo, or reecho in Wiktionary, the free dictionary. An echo is a reflection of sound. Echo may also refer to: Echo (DC Comics), various different
Echo_(disambiguation)
Network protocol for copying files between computers
Secure copy protocol (SCP) is a means of securely transferring computer files between a local host and a remote host or between two remote hosts. It is
Secure_copy_protocol
Mechanism to wake up computers via a network
number), 7 (Echo Protocol) or 9 (Discard Protocol), or directly over Ethernet using EtherType 0x0842. A connection-oriented transport-layer protocol like TCP
Wake-on-LAN
Service in the Internet Protocol Suite
13:45:51-PST List of well-known ports Echo Protocol QOTD Time Protocol Network Time Protocol RFC 867 List of NIST time servers supporting this protocol v t e
Daytime_Protocol
Internet protocol that discards all input
various routers, this TCP or UDP port 9 for the Discard Protocol (or port 7 for the Echo Protocol relaying ICMP datagrams) is also used by default as a
Discard_Protocol
Internet Protocol Suite service
[citation needed] Internet portal Barber pole Echo Protocol Discard Protocol QOTD Daytime Protocol Time Protocol "NVD - CVE-1999-0103". nvd.nist.gov. Retrieved
Character_Generator_Protocol
Service in the Internet Protocol Suite
internal time dgram udp wait root internal Echo Protocol Discard Protocol Daytime Protocol Character Generator Protocol rdate, a tool for querying the current
Time_Protocol
Network protocol
protocol in the IPX/SPX protocol suite. IPX is derived from Xerox Network Systems' IDP. It also has the ability to act as a transport layer protocol.
Internetwork_Packet_Exchange
Monitoring MIB Protocol Identifier Macros. IETF. doi:10.17487/RFC2896. RFC 2896. Retrieved 2018-07-13. Postel, J. (May 1983). Echo Protocol. IETF. p. 1.
List of TCP and UDP port numbers
List_of_TCP_and_UDP_port_numbers
Voice command device from Amazon
Amazon Echo, often shortened to Echo, is a brand of smart speakers developed by Amazon. Echo devices connect to the voice-controlled intelligent personal
Amazon_Echo
Early internetworking protocol
simple echo protocol at the internetwork layer, similar to IP's ping, but operating at a lower level. To establish a transport connection, two protocols came
PARC_Universal_Packet
2026 South Korean television series
with other details in costumes and court etiquette, inadvertently echoed protocols of tributary states and could lend credibility to China's Northeast
Perfect_Crown
TELNET PROTOCOL SPECIFICATION May 1983 Telnet RFC 855 TELNET OPTION SPECIFICATIONS May 1983 RFC 862 Echo Protocol May 1983 Echo RFC 863 Discard Protocol May
List_of_RFCs
Topics referred to by the same term
superset of OpenGL ES 3.1 introduced by Google in 2014 AppleTalk Echo Protocol, a protocol designed to test the reachability of network nodes AEP Olympias
AEP
Character used to start an escape sequence
syntax for many programming languages, data formats, and communication protocols. For a given alphabet an escape character's purpose is to start character
Escape_character
TCP/IP application layer protocol
communication protocol designed for distributing, searching, and retrieving documents in Internet Protocol networks. The design of the Gopher protocol and user
Gopher_(protocol)
Group of communications protocols
GPRS Tunnelling Protocol (GTP) is a group of IP-based communications protocols used to carry general packet radio service (GPRS) within GSM, UMTS, LTE
GPRS_Tunnelling_Protocol
Display of data which has been transmitted
from the local modem. A displayed 'echo' is independent of 'duplex' (or any) telecommunications transmission protocol. Probably from technical ignorance
Echo_(computing)
Communications endpoint in an operating system
that use port numbers are the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP). The port completes the destination and origination
Port_(computer_networking)
Suite of computer network protocols developed by Xerox
other protocol suites), remains in use today in other protocol suites, such as the Internet protocol suite. XNS also implements a simple echo protocol at
Xerox_Network_Systems
Web standards
used for web feeds, while the Atom Publishing Protocol (AtomPub or APP) is a simple HTTP-based protocol for creating and updating web resources. Web feeds
Atom_(web_standard)
Dutch electronic music duo
Revealed Recordings "Astronaut" DOORN Records (Spinnin') with Ibranovski "Echo" Protocol Recordings "Rocket" Revealed Recordings with W&W "Legend Comes To Life"
Blasterjaxx
Internet protocol
controllers. Echo request – not a part of RRCP protocol itself, but is closely associated, being an underlying mechanism for a Layer-2 analog of ICMP Echo request
Realtek Remote Control Protocol
Realtek_Remote_Control_Protocol
Principal protocol used to stream data across an IP network
The Transmission Control Protocol (TCP) is one of the main protocols of the Internet protocol suite, providing reliable, ordered, and error-checked delivery
Transmission_Control_Protocol
Network protocol for virtual terminals
application protocol that provides access to virtual terminals of remote systems on local area networks or the Internet. It is a protocol for bidirectional
Telnet
Extension to the Internet Protocol to signal network congestion
congestion indication is handled by the upper layer protocol (transport layer protocol) and needs to be echoed back to the transmitting node in order to signal
Explicit Congestion Notification
Explicit_Congestion_Notification
Computer protocol
negotiate FISH protocol, its version and extensions. #FISH echo; start_fish_server; echo '### 200' #VER 0.0.2 <feature1> <feature2> <...> echo '### 000' The
Files transferred over shell protocol
Files_transferred_over_shell_protocol
Proposal to carry IP traffic by birds
echo request), and received four responses. Script started on Sat Apr 28 11:24:09 2001 $ /sbin/ifconfig tun0 tun0 Link encap:Point-to-Point Protocol inet
IP_over_Avian_Carriers
Communication protocol for streaming data over the Internet
Messaging Protocol (RTMP) is a communication protocol for streaming audio, video, and data over the Internet. Originally developed as a proprietary protocol by
Real-Time_Messaging_Protocol
Methods of delivering voice communications and multimedia over IP networks
Internet Protocol (VoIP), also known as IP telephony, is a set of technologies used primarily for voice communication sessions over Internet Protocol (IP)
Voice_over_IP
The standard protocol is ASCII with XON/XOFF flow control, using a 10-bit code (1 start bit, 7 data bits, even parity, 1 stop bit). No echo shall be employed
Telocator Alphanumeric Protocol
Telocator_Alphanumeric_Protocol
Attack on a computer system by pinging a computer
A correctly formed ICMP echo request is typically 56 bytes in size, or 64 bytes when the Internet Control Message Protocol (ICMP) header is considered
Ping_of_death
Network protocol
GTP' (GTP prime) is an IP based protocol used within GSM and UMTS networks. It can be used with UDP or TCP. GTP' uses the same message structure as GTP
GTP'
Computer network protocol
communications protocol, providing a bidirectional communication channel over a single Transmission Control Protocol (TCP) connection. The protocol was standardized
WebSocket
Specialized Internet application protocol
Constrained Application Protocol (CoAP) is a specialized UDP-based Internet application protocol for constrained devices, as defined in RFC 7252 (published
Constrained Application Protocol
Constrained_Application_Protocol
PHP driver for MySQL databases
Text protocol returns strings by default <?php $mysqli = new mysqli("example.com", "user", "password", "database"); if ($mysqli->connect_errno) { echo "Failed
MySQLi
North Korean politician (1946–2013)
demonstrated during his 2012 visit to China: various aspects of the visit echoed protocol which had previously been followed only for Kim Jong Il, including
Jang_Song-thaek
Internet protocol used for error messages in network operations
Control Message Protocol version 6 (ICMPv6) is the implementation of the Internet Control Message Protocol (ICMP) for Internet Protocol version 6 (IPv6)
ICMPv6
Mesh wireless network developed by Amazon
Amazon Sidewalk is a low-bandwidth long-range wireless communication protocol developed by Amazon. It uses Bluetooth Low Energy (BLE) for short distance
Amazon_Sidewalk
Program that emulates a video terminal
echo mode and does not require local echo. When entering a password, for example, line-at-a-time entry with local editing is possible, but local echo
Terminal_emulator
Fault detection protocol
Bidirectional Forwarding Detection (BFD) is a network protocol that is used to detect faults between two routers or switches connected by a link. It provides
Bidirectional Forwarding Detection
Bidirectional_Forwarding_Detection
Antisemitic symbol
Triple parentheses or triple brackets, also referred to as an echo (stylized as (((echo)))), are an antisemitic symbol and orthotypographical convention
Triple_parentheses
Social platform
was developed as a reference implementation of the AT Protocol, an open communication protocol for distributed social networks. Bluesky Social promotes
Bluesky
Tool to measure bandwidth and response times between two hosts
response times between two hosts using Internet Control Message Protocol (ICMP) echo request/echo reply mechanism. It does not require any special software
BWPing
networking, the Link Control Protocol (LCP) forms part of the Point-to-Point Protocol (PPP), within the family of Internet protocols. In setting up PPP communications
Link_Control_Protocol
Computer network diagnostic tool
ICMP Echo Request packets (-I), or any arbitrary protocol (-P) such as UDP, TCP using TCP SYN packets, or ICMP. On Windows, tracert sends ICMP Echo Request
Traceroute
JSON-based wire protocol for remote procedure calls
{"method": "echo", "params": ["Hello JSON-RPC"], "id": 1} <-- {"result": "Hello JSON-RPC", "error": null, "id": 1} gRPC - cross-platform binary RPC protocol SOAP
JSON-RPC
DF1 protocol is an asynchronous byte-oriented protocol that is used to communicate with most Allen Bradley RS-232 interface modules. DF1 protocol consists
DF-1_Protocol
Autocrypt is a cryptographic protocol for email clients aiming to simplify key exchange and enabling encryption. [citation needed] Version 1.0 of the Autocrypt
Autocrypt
Web application framework by NextApp
Echo is a web application framework created by the company NextApp. The latest iteration, Echo3, allows writing applications in either server-side Java
Echo_(framework)
Control center for a smart home
are: Homey Various communication protocols can be used between smart home hubs and smart house components. The protocols can be grouped into wired and wireless
Smart_home_hub
Connection between two remote computers
connection between two remote computers (a client and proxy), using ICMP echo requests and reply packets. An example of this technique is tunneling complete
ICMP_tunnel
American actress (born 1976)
Impossible, making appearances in Mission: Impossible III (2006), Ghost Protocol (2011), and Fallout (2018). On television, Monaghan starred in the first
Michelle_Monaghan
TLS extension to serve multiple HTTPS sites
listener, the server has no way to know which certificate to use in the TLS protocol. In more detail, when making a TLS connection, the client requests a digital
Server_Name_Indication
Smart-home connectivity standard
compatibility of the products for consumers. The standard operates on Internet Protocol (IP) and functions via one or more controllers that connect and manage
Matter_(standard)
Italian semiotician, philosopher and writer (1932–2016)
the rise of Modern-day antisemitism, by way of the Dreyfus affair, The Protocols of the Elders of Zion and other important 19th-century events which gave
Umberto_Eco
following is a comparison of instant messaging protocols. It contains basic general information about the protocols. One-to-many/many-to-many communications
Comparison of instant messaging protocols
Comparison_of_instant_messaging_protocols
2026 Android mobile operating system
stations. On-Device Artificial Intelligence SystemsAppFunctions Integration Protocol: The introduction of the androidx.appfunctions architecture standardizes
Android_17
Extreme accumulation of broadcast and multicast traffic on a computer network
attacker sends a large amount of ICMP Echo Requests (ping) traffic to a broadcast address, with each ICMP Echo packet containing the spoof source address
Broadcast_storm
Communications protocol
Datagram Transport Layer Security (DTLS) is a communications protocol providing security to datagram-based applications by allowing them to communicate
Datagram Transport Layer Security
Datagram_Transport_Layer_Security
across packet networks using transport protocols such as Asynchronous Transfer Mode (ATM) and Internet Protocol (IP). Because the media gateway connects
Media_gateway
co-EP and the company announcing it would be "implementing additional HR protocols." Alarr's departure comes in the aftermath of an investigation conducted
2023_in_American_television
Protocol and file format to list the URLs of a website
Sitemaps is a protocol in XML format meant for a webmaster to inform search engines about URLs on a website that are available for web crawling. It allows
Sitemaps
Type of cyber-attack
websites. In October 2023, exploitation of a new vulnerability in the HTTP/2 protocol resulted in the record for largest HTTP DDoS attack being broken twice
Denial-of-service_attack
American multinational technology company
systems to talk to one another, creating a box that functioned as a multi-protocol router called the "Blue Box". The Blue Box used circuitry made by Andy
Cisco
Demarcation line halving Gaza as part of the October 2025 peace plan
1981–1982 Fahd Plan 1990s 1991 Madrid Conference 1993–1995 Oslo Accords 1994 Paris Protocol 1994 Gaza–Jericho Agreement 1994–present US security assistance to the
Yellow_Line_(Gaza)
Windowing system for bitmap displays on UNIX-like systems
Project Athena at Massachusetts Institute of Technology (MIT) in 1984. The X protocol has been at version 11 (hence "X11") since September 1987. The X.Org Foundation
X_Window_System
Family of large language models by Google
Shell Cloud Storage Code Search Compute Engine Cpplint D–N Dalvik Data Protocol Data Studio Dialogflow Exposure Notification Fast Pair Fastboot Federated
Gemma_(language_model)
Open source, decentralized, mesh network
Meshtastic is a LoRa-based mesh networking protocol and software platform. The main goal of the project is enabling low-power, long-range communication
Meshtastic
Human-caused changes to climate on Earth
gas emissions than the Kyoto Protocol specifically designed to do so. The most recent amendment to the Montreal Protocol, the 2016 Kigali Amendment, committed
Climate_change
International treaties of war
series of four international treaties (1949) and their three additional protocols that form the core of international humanitarian law. They establish legal
Geneva_Conventions
Active computer network measurement technology
Hypertext Transfer Protocol (HTTP) GET File Transfer Protocol (FTP) downloads Domain Name System (DNS) lookups User Datagram Protocol (UDP) echo, for VoIP jitter
Service_Assurance_Agent
Cyberattack method based on Internet Protocol fragmentation
Destination Protocol Info 1 0.000000 87.247.163.96 66.94.234.13 ICMP Echo (ping) request 2 0.000000 87.247.163.96 66.94.234.13 IP Fragmented IP protocol (proto=ICMP
IP_fragmentation_attack
Video-sharing platform
Wojcicki Criticism General Censorship DeGoogle FairSearch "Google's Ideological Echo Chamber" No Tech for Apartheid Privacy concerns Street View YouTube Trade
YouTube
After Burner Climax Shoot em' up Sega (AM2) PlayStation 3 Xbox 360 Alpha Protocol Action RPG Obsidian Entertainment Xbox 360 PlayStation 3 Microsoft Windows
List_of_Sega_video_games
toward lowering emission rates, but blindspots in current monitoring protocols mean they often evade detection. Cusworth, Daniel H.; Duren, Riley M.;
2024_in_science
American computer programmer
the FSF, Fox authored GNU Bash, GNU Makeinfo, GNU Info, GNU Finger, GNU Echo and the readline and history libraries. He was also the maintainer of GNU
Brian_Fox_(programmer)
past temperate environments. Richter, Meade & Pickles (2025) present a protocol aiding the identification of fragmented fossil remains using geometric
2025_in_paleontology
Online tool for synthesizing documents
Shell Cloud Storage Code Search Compute Engine Cpplint D–N Dalvik Data Protocol Data Studio Dialogflow Exposure Notification Fast Pair Fastboot Federated
Gemini_Notebook
American multinational technology company
a memo throughout the company that argued bias and "Google's Ideological Echo Chamber" clouded their thinking about diversity and inclusion, and that it
Data transfer program by Samsung and Google
Wojcicki Criticism General Censorship DeGoogle FairSearch "Google's Ideological Echo Chamber" No Tech for Apartheid Privacy concerns Street View YouTube Trade
Quick_Share
British actor, director and writer (died 2023)
Boy. Kent was the writer and director of the 2015 gangster film Abusing Protocol. Kent lived with osteoporosis, arthritis, and a skin disorder before his
Darren_Kent
2: Physical and data link protocols for shared communication ISO/IEC 4005-3:2023 Part 3: Physical and data link protocols for control communication ISO/IEC
List of ISO standards 3000–4999
List_of_ISO_standards_3000–4999
2024 book by Annie Jacobsen
development of American nuclear doctrine since the 1960s and contemporary protocols that would govern U.S. response to a nuclear attack. The book received
Nuclear_War:_A_Scenario
CEO of Alphabet Inc. and Google (born 1972)
Valley". The Guardian. Retrieved February 17, 2026. "Google's Ideological Echo Chamber" (PDF). Archived (PDF) from the original on August 8, 2017. Retrieved
Sundar_Pichai
Routing protocol for multi-hop mobile ad hoc networks
change to a throughput-based metric. A new neighbor discovery protocol, the Echo Location Protocol (ELP), was introduced. Separating neighbor discovery from
B.A.T.M.A.N.
Microkernel operating system
Transaction Protocol (VMTP) was developed to extend the send-receive-reply system call semantics over a local area network. The protocol included multicast
V_(operating_system)
1981–1982 Fahd Plan 1990s 1991 Madrid Conference 1993–1995 Oslo Accords 1994 Paris Protocol 1994 Gaza–Jericho Agreement 1994–present US security assistance to the
List_of_leaders_of_Hamas
Remote desktop software tool
computer's desktop through a proprietary protocol also developed by Google, internally called Chromoting. The protocol transmits the keyboard and mouse events
Chrome_Remote_Desktop
Virtual keyboard app for Android and iOS
Shell Cloud Storage Code Search Compute Engine Cpplint D–N Dalvik Data Protocol Data Studio Dialogflow Exposure Notification Fast Pair Fastboot Federated
Gboard
Cognitive capacity of horses
cognition, contributing to the adoption of more rigorous experimental protocols. As Deneux-Le Barh notes, "experimental sciences aim to minimize the influence
Equine_intelligence
Canadian e-commerce company
announces a new protocol to facilitate commerce using AI agents". TechCrunch. Retrieved March 2, 2026. "Google launches Universal Commerce Protocol, bets on
Shopify
Messaging and VoIP service owned by Meta
messaging and presence protocol (XMPP). A 2019 document released by the DOJ confirms this by naming "FunXMPP" as the protocol used by WhatsApp. The document
ECHO PROTOCOL
ECHO PROTOCOL
ECHO PROTOCOL
ECHO PROTOCOL
ECHO PROTOCOL
ECHO PROTOCOL
ECHO PROTOCOL
ECHO PROTOCOL
ECHO PROTOCOL