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Proprietary data link network protocol
Cisco Discovery Protocol (CDP) is a proprietary data link layer protocol developed by Cisco Systems in 1994 by Keith McCloghrie and Dino Farinacci. It
Cisco_Discovery_Protocol
Protocol used by network devices for advertising their identity
proprietary protocols, such as Cisco Discovery Protocol, Foundry Discovery Protocol, Nortel Discovery Protocol and Link Layer Topology Discovery. Information
Link_Layer_Discovery_Protocol
Address Resolution Protocol ATM Asynchronous Transfer Mode CHAP Challenge Handshake Authentication Protocol CDP Cisco Discovery Protocol DCAP Data Link Switching
List of network protocols (OSI model)
List_of_network_protocols_(OSI_model)
Proprietary link aggegration protocol
Cisco multicast address 01-00-0C-CC-CC-CC with protocol type code 0x0104. PAgP uses the same multicast group MAC address as Cisco Discovery Protocol (CDP)
Port_Aggregation_Protocol
Automatic detection of devices and services on a computer network
administrators. A service discovery protocol (SDP) is a network protocol that helps accomplish service discovery. Service discovery requires a common language
Service_discovery
Computer network management and monitoring protocol
Secure Internet Security Solutions. Cisco Press. pp. 52. ISBN 9781587050169. HMAC-SHA-2 Authentication Protocols in the User-based Security Model (USM)
Simple Network Management Protocol
Simple_Network_Management_Protocol
Denial-of-service attack on network devices
employed to compromise the operation of network devices that use Cisco Discovery Protocol (CDP) for discovering neighboring devices. CDP spoofing is a network
CDP_spoofing
OSI model layer for node-to-node data transfer
link layer. ARCnet Address Resolution Protocol (ARP) Asynchronous Transfer Mode (ATM) Cisco Discovery Protocol (CDP) Controller Area Network (CAN) Econet
Data_link_layer
American multinational technology company
Cisco certifications Cisco IOS Packet Tracer Cisco Catalyst Cisco DevNet Cisco Express Forwarding Cisco Discovery Protocol Cisco Security Agent Cisco
Cisco
Enhancement to Cisco Discovery Protocol
On-Demand Routing ("ODR") is an enhancement to Cisco Discovery Protocol (CDP), a protocol used to discover other Cisco devices on either broadcast or non-broadcast
On_Demand_Routing
System for delivering power along with data over an Ethernet cable
between the endpoint and the Cisco switch based on a power value that was added to the Cisco proprietary Cisco Discovery Protocol (CDP). CDP is also responsible
Power_over_Ethernet
Internet protocol used for error messages in network operations
The Internet Control Message Protocol (ICMP) is a supporting protocol in the Internet protocol suite. It is used by network devices, including routers
Internet Control Message Protocol
Internet_Control_Message_Protocol
Computer network protocol to determine the maximum size of packets to transmit
Internet Protocol (IP) hosts, usually with the goal of avoiding IP fragmentation. PMTUD was originally intended for routers in Internet Protocol Version
Path_MTU_Discovery
Extension of a private network across a public one
proprietary VPN protocols: Cisco's Layer 2 Forwarding (L2F) (obsolete as of 2009[update]) and Microsoft's Point-to-Point Tunneling Protocol (PPTP). Desktop
Virtual_private_network
Network communications domain that is isolated at the data link layer
available only on some Cisco equipment and has been deprecated. VLAN Trunking Protocol (VTP) is a Cisco proprietary protocol that propagates the definition
VLAN
Topics referred to by the same term
type of battery-charging USB port Cisco Discovery Protocol, a proprietary data link network protocol developed by Cisco Systems Columbia Data Products,
CDP
Proprietary link layer protocol by Microsoft
Management Protocol Service Discovery Link Layer Discovery Protocol - same aim (and layer) but IEEE standard protocol. Cisco Discovery Protocol - Similar
Link_Layer_Topology_Discovery
Computer network protocol
on the LAN and WAN side. Cisco's proprietary Interior Gateway Routing Protocol (IGRP) was a somewhat more capable protocol than RIP. It belongs to the
Routing_Information_Protocol
Logical identifier addressing a specific group of devices on a network
Ethernet multicast, and at the internet layer (layer 3 for OSI) for Internet Protocol Version 4 (IPv4) or Version 6 (IPv6) multicast. IPv4 multicast addresses
Multicast_address
Communications protocol for message-oriented middleware
Extensible Messaging and Presence Protocol (abbreviation XMPP, originally named Jabber) is an open communication protocol designed for instant messaging
XMPP
Computer networking protocol
The Point-to-Point Protocol over Ethernet (PPPoE) is a network protocol for encapsulating Point-to-Point Protocol (PPP) frames inside Ethernet frames.
Point-to-Point Protocol over Ethernet
Point-to-Point_Protocol_over_Ethernet
Associates addresses in the layers of a networked device implementation
networking Cisco HDLC – Extension to the High-Level Data Link Control (HDLC) network protocol Neighbor Discovery Protocol – Protocol in the Internet protocol suite
Address_Resolution_Protocol
Cisco Discovery Protocol, Link Layer Discovery Protocol, Foundry Discovery Protocol or SynOptics Network Management Protocol is available, discovery of
Netdisco
Computer networking protocol
communication: Cisco's Layer 2 Forwarding Protocol (L2F) and Microsoft's Point-to-Point Tunneling Protocol (PPTP). A new version of this protocol, L2TPv3, appeared
Layer_2_Tunneling_Protocol
Multicast routing protocol
LAN, WAN or the Internet. It is termed protocol-independent because PIM does not include its own topology discovery mechanism, but instead uses routing information
Protocol-Independent Multicast
Protocol-Independent_Multicast
Control Protocol. Webex, Cloud-based Collaboration Tools Cisco Active Network Abstraction Cisco Fabric Manager Data Center Management and Automation—Cisco Intelligent
List_of_Cisco_products
One-to-many computer networking protocol
destination computers simultaneously: Multicast Source Discovery Protocol, Multicast BGP, Protocol Independent Multicast. Multicast routing is a method
Multicast_routing
CDMA—Code-division multiple access CDN—Content delivery network CDP—Cisco Discovery Protocol CDP—Continuous data protection CD-R—CD-Recordable CD-ROM—CD Read-Only
List of computing and IT abbreviations
List_of_computing_and_IT_abbreviations
Routing protocol for IP networks
Multicast Open Shortest Path First (MOSPF) protocol. Cisco does not include MOSPF in their OSPF implementations. Protocol Independent Multicast (PIM) in conjunction
Open_Shortest_Path_First
time was subsequently revoked and eventually re-assigned for use by Cisco's URD protocol. Subsequently, port 587 was assigned as the SMTP submission port
List of TCP and UDP port numbers
List_of_TCP_and_UDP_port_numbers
Framework for communication protocols used in IP networking
foundational protocols in the suite are the Transmission Control Protocol (TCP), the User Datagram Protocol (UDP), and the Internet Protocol (IP). Early
Internet_protocol_suite
Internet routing security framework
Authorization (ASPA), as well as Neighbor Discovery Protocol (ND) for IPv6 through the Secure Neighbor Discovery protocol (SEND). The RPKI architecture is documented
Resource Public Key Infrastructure
Resource_Public_Key_Infrastructure
IPv6 network protocol extension
The Secure Neighbor Discovery (SEND) protocol is a security extension of the Neighbor Discovery Protocol (NDP) in IPv6 defined in RFC 3971 and updated
Secure_Neighbor_Discovery
Communication protocol that allows connections between networks
The Internet Protocol (IP) is the network layer communications protocol in the Internet protocol suite for relaying datagrams across network boundaries
Internet_Protocol
Protocol for establishing multicast group memberships on IPv4 networks
The Internet Group Management Protocol (IGMP) is a communications protocol used by hosts and adjacent routers on IPv4 networks to establish multicast group
Internet Group Management Protocol
Internet_Group_Management_Protocol
Secure network protocol suite
In computing, Internet Protocol Security (IPsec) is a secure network protocol suite that authenticates and encrypts packets of data to provide secure encrypted
IPsec
Size of largest allowed packet on a network segment
decide MTU at connect time, e.g., using Path MTU Discovery. MTUs apply to communications protocols and network layers. The MTU is specified in terms
Maximum_transmission_unit
American cybersecurity company
Cisco Talos (Talos), or Cisco Talos Threat Intelligence Group, is a cybersecurity threat intelligence team that operates as part of Cisco Systems, Inc
Cisco_Talos
Networking protocol for clock synchronization
12 January 2011.[permanent dead link] "Cisco IOS Software Network Time Protocol Packet Vulnerability". Cisco Systems. 23 September 2009. Archived from
Network_Time_Protocol
Type of virtual private network
by Chandan Mishra from Cisco Systems. This method is also known as a Layer 2 circuit. It uses the Label Distribution Protocol (LDP) to communicate between
Layer_2_MPLS_VPN
Principal protocol used for transmission of datagrams across an IP network
computer networking, the User Datagram Protocol (UDP) is one of the core communication protocols of the Internet protocol suite used to send messages (transported
User_Datagram_Protocol
Network protocol
Services Protocol (NLSP) based on IS-IS is available, which is more suitable for larger networks. Cisco routers implement an IPX version of EIGRP protocol as
Internetwork_Packet_Exchange
British video technology company
Synamedia Ltd. (previously Cisco's SPVSS business, and formerly NDS Group Ltd., and later Cisco Videoscape) is a video technology provider headquartered
Synamedia
Networking hardware that forwards packets based on hardware address
(September 1998). "Layer 2 and Layer 3 Switch Evolution". cisco.com. The Internet Protocol Journal. Cisco Systems. Archived from the original on 2014-08-29.
Network_switch
Large peer-to-peer network by Nullsoft
W., 'Network Fundamentals', Cisco Networking Academy, Cisco Press, Ch 3. p90 "Gnutella Protocol Development". rfc-gnutella.sourceforge.net. Archived from
Gnutella
used by the Spanning Tree Protocol (PVST+ is also supported) Cisco Discovery Protocol messages Link Layer Discovery Protocol messages IGMP version 1 and
Mausezahn
predominantly for ProCurve products. PCM uses Link Layer Discovery Protocol (LLDP, Cisco Discovery Protocol (CDP) and FDP (Foundry) for detecting network devices
List_of_ProCurve_products
Television transmitted over a computer network
Internet Protocol television (IPTV), also called TV over broadband, is the service delivery of television over Internet Protocol (IP) networks. Usually
Internet_Protocol_television
Fourth version of the Internet Protocol
Internet Protocol version 4 (IPv4) is the first version of the Internet Protocol (IP) as a standalone specification. It is one of the core protocols of standards-based
IPv4
Networking service
"Virtual Private LAN Service (VPLS) Using BGP for Auto-Discovery and Signalling" H. Shah (Cisco Systems) (January 2015). "RFC 7436: IP‑Only LAN Service
Virtual_Private_LAN_Service
Computer networking concept
2018 by Cisco Press IP Multicast, Volume I: Cisco IP Multicast Networking by Josh Loveless, Ray Blair and Arvind Durai, 12 Oct 2016 by Cisco Press. Part
Broadcast, unknown-unicast and multicast traffic
Broadcast,_unknown-unicast_and_multicast_traffic
Method of delegation of routing prefixes automatically in IPv6
Configuration Protocol (DHCP) version 6". IETF. Talwar, Mohit; Thaler, Dave; Patel, Chirayu (April 2006). "RFC 4389: Neighbor Discovery Proxies (ND Proxy)"
Prefix_delegation
Protocol to run DNS queries over HTTPS
DNS over HTTPS (DoH) is a protocol for performing remote Domain Name System (DNS) resolution via the HTTPS protocol. A goal of the method is to increase
DNS_over_HTTPS
Way to traverse IP address spaces without routing
Address Translators" (PDF). The Internet Protocol Journal. "What Is Network Address Translation (NAT)?". Cisco. Retrieved 2026-07-13. Heon Y. Yeom; Jungsoo
Network_address_translation
Version 6 of the Internet Protocol
Internet Protocol version 6 (IPv6) is the most recent version of the Internet Protocol (IP), the communications protocol that provides an identification
IPv6
Reference model for network communication
well-known communication protocols are decomposed in software development into the model's hierarchy of function calls. The Internet protocol suite as defined
OSI_model
All major softwire protocols are open standards maintained by the IETF. They are implemented by leading router vendors (including Cisco, Juniper, Nokia,
Softwire_(protocol)
Frames in the Wi-Fi standards (Ipv4_Ipv6 802.11)
In the IEEE 802.11 wireless LAN protocols (such as Wi-Fi), a MAC frame is constructed of common fields (which are present in all types of frames) and
802.11_frame_types
Unique identifier assigned to network interfaces
with the Address Resolution Protocol (ARP) for IPv4 and the Neighbor Discovery Protocol (NDP) for IPv6. Thus ARP and NDP relate OSI layer 3 addresses to layer
MAC_address
Ip6config — The IPv6 Experts.net "DNS-server-address | ICMP Router Discovery Protocol User Guide | Juniper Networks TechLibrary". "30588 – off topic discussion
Comparison of IPv6 support in operating systems
Comparison_of_IPv6_support_in_operating_systems
Logical subdivision of an IP network
on-link determination is different in detail and requires the Neighbor Discovery Protocol (NDP). IPv6 address assignment to an interface carries no requirement
Subnet
IETF working group
compression, neighbor discovery and other mechanisms that allow IPv6 to operate over IEEE 802.15.4 based networks. Although IPv4 and IPv6 protocols do not generally
6LoWPAN
are automatically generated by scanning the network using network discovery protocols. Some of these tools integrate into documentation and monitoring
Network_diagram_software
Standard for booting from a server
Server Discovery Protocol (BSDP) v0.1" (Doc). Apple Corporation. 2003-12-02. Retrieved 2014-04-04. "NetBoot 2.0: Boot Server Discovery Protocol (BSDP)
PXE_boot
Season of television series
season of the American television series Star Trek: Discovery follows the crew of the starship Discovery in the 32nd century, more than 900 years after Star
Star_Trek:_Discovery_season_4
Cryptographic protocols for securing data in transit
is a cryptographic protocol designed to provide secured communications over a computer network, such as the Internet. The protocol is widely used in applications
Transport_Layer_Security
Sending datagrams to multiple receivers
IP multicast is a method of sending Internet Protocol (IP) datagrams to a group of interested receivers in a single transmission. It is the IP-specific
IP_multicast
Cisco Systems, where he worked on the development and standardization of architectural enhancements to the Internet Protocol. Prior to joining Cisco in
Steve_Deering
American engineer
multi-threaded process] [US Patent 7,065,579 - System using peer discovery and peer membership protocols for accessing peer-to-peer platform resources on a network]
William_Yeager
Computer networking protocol suite
1989. "AppleTalk Overview" (PDF). Cisco. 2 February 2010. Retrieved 21 March 2023. "AppleTalk Address Resolution Protocol". DevX. Retrieved 29 January 2025
AppleTalk
Network protocol
support for both protocols such as Marvell, Microsoft, Linux and Kazan. Cisco supports both RoCE and their own VIC RDMA protocol. Both Protocols are standardized
RDMA_over_Converged_Ethernet
he was vice president and chief technology officer for Collaboration at Cisco, having previously worked as Skype's chief technology strategist. Rosenberg
Jonathan Rosenberg (SIP author)
Jonathan_Rosenberg_(SIP_author)
Computer network protocol
2011). "Port Control Protocol". The Internet Protocol Journal. Cisco Systems. Retrieved January 31, 2014. "Port Control Protocol Overview (Junos OS 13
Port_Control_Protocol
Processes for maintaining a system
network (MANs) and Ethernet WANs. The OAM features covered by this protocol are discovery, link monitoring, remote fault detection and remote loopback. Fault
Operations, administration, and management
Operations,_administration,_and_management
Set of IEEE standards relating to data networking
Control Connectivity Discovery — Amendment: Support for Multiframe Protocol Data Units". IEEE. "P802.1ABdh – Support for Multiframe Protocol Data Units". 1
IEEE_802.1
Open standard family of wired computer networking protocols
Link Layer Discovery Protocol List of interface bit rates LocalTalk PHY Physical coding sublayer Power over Ethernet Point-to-Point Protocol over Ethernet
Ethernet
Wide area network technology
Cisco, Digital Equipment Corporation (DEC), Northern Telecom, and StrataCom formed a consortium to focus on its development. They produced a protocol
Frame_Relay
American information technology company
by Cisco and upheld an import ban on infringing products. In 2016, on appeal, the ban was reversed following product changes and two overturned Cisco patents
Arista_Networks
Authentication networking protocol
RADIUS protocol is currently defined in the following IETF RFC documents. Security Assertion Markup Language TACACS "How Does RADIUS Work?". Cisco. 2006-01-19
RADIUS
Internet Protocol-based storage networking standard for linking data storage facilities
Computer Systems Interface (iSCSI; /aɪˈskʌzi/ eye-SKUZ-ee) is an Internet Protocol-based storage networking standard for linking data storage facilities.
ISCSI
Ethernet enhancement
Data Center Bridging Capabilities Exchange Protocol (DCBX): a discovery and capability exchange protocol that is used for conveying capabilities and
Data_center_bridging
Label to identify a network interface of a computer or other network node
An Internet Protocol version 6 address (IPv6 address) is a numeric label that is used to identify and locate a network interface of a computer or a network
IPv6_address
Open and decentralized authentication protocol standard
OpenID is an open standard and decentralized authentication protocol promoted by the non-profit OpenID Foundation. It allows users to be authenticated
OpenID
Part of a network quietly losing traffic
undetectable only to protocols that are both connectionless and unreliable (e.g., UDP). Connection-oriented or reliable protocols (TCP, RUDP) will either
Black_hole_(networking)
Form of computer communication over the internet or locally
sent). Instant messaging was pioneered in the early Internet era; the IRC protocol was the earliest to achieve wide adoption. Later in the 1990s, ICQ was
Instant_messaging
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
routing protocols and structures in meshed IP networks by participating as a peer in the network to passively “listen” to Layer 3 routing protocol exchanges
Packet_Design
Way to identify a logical unit in computer storage
Number (LUN)?". Techopedia. Retrieved 2016-03-30. Long, James (2006). Storage Networking Protocol Fundamentals. Cisco Press. p. 111. ISBN 9781587051609.
Logical_unit_number
Multicast routing technique to minimize loops and enhance security
used in conjunction with a multicast routing protocol such as Multicast Source Discovery Protocol or Protocol Independent Multicast to ensure loop-free forwarding
Reverse-path_forwarding
Combined bridging and routing protocol
level and IEEE 802.1 port level protocols including PAUSE (IEEE 802.3 Annex 31B), the Link Layer Discovery Protocol (IEEE 802.1AB), link aggregation
TRILL
Internet Protocol routing software
(Internet Group Management Protocol, Version 2) RFC 3376 (Internet Group Management Protocol, Version 3) Multicast Listener Discovery (MLD v1 and v2): RFC 2710
XORP
Technologies for computer networking
2015-03-08. Retrieved 2018-08-28. "Cisco 100GBASE QSFP-100G Modules Data Sheet". Cisco. Retrieved 2022-09-16. "Cisco 100Gbps QSFP100 SR1.2 BiDi Pluggable
100_Gigabit_Ethernet
Firmware family used on Force10 Ethernet switches
including: Spanning Tree Protocol and RSTP, VLAN and the IEEE 802.1Q standards, QinQ or IEEE 802.1ad, Link Layer Discovery Protocol and LLDP MED. The S-series
FTOS
Virtual network switch
Protocol (IGMP) Support for the Shortest Path Bridging Media Access Control (SPBM) and associated basic support for the Link Layer Discovery Protocol
Open_vSwitch
Systems management standards
environments. The WBEM initiative, initially sponsored in 1996 by BMC Software, Cisco Systems, Compaq Computer, Intel, and Microsoft, is now widely adopted. WBEM
Web-Based Enterprise Management
Web-Based_Enterprise_Management
Operating system for network equipment
including: Spanning Tree Protocol and RSTP, VLAN and the IEEE 802.1Q standards, QinQ or IEEE 802.1ad, Link Layer Discovery Protocol and LLDP MED. The S-series
Dell Networking Operating System
Dell_Networking_Operating_System
and engineers to build and interconnect computer networks. The Internet Protocol Suite, the set of rules used to communicate between networks and devices
History_of_the_Internet
Framework for remote procedure calls
implements a proprietary application layer communications protocol, called the Ice protocol, that can run over TCP, TLS, UDP, WebSocket and Bluetooth
Internet Communications Engine
Internet_Communications_Engine
Network addressing and routing methodology
uses TCP. Anycast rendezvous point can be used in Multicast Source Discovery Protocol (MSDP) and its advantageous application as Anycast RP is an intra-domain
Anycast
Interoperability standard for professional audio over IP
standard calls out several protocol options for device discovery, but does not require any to be implemented. Session Initiation Protocol is used for unicast
AES67
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CISCO DISCOVERY-PROTOCOL
CISCO DISCOVERY-PROTOCOL
CISCO DISCOVERY-PROTOCOL
CISCO DISCOVERY-PROTOCOL
CISCO DISCOVERY-PROTOCOL
CISCO DISCOVERY-PROTOCOL
CISCO DISCOVERY-PROTOCOL
CISCO DISCOVERY-PROTOCOL
CISCO DISCOVERY-PROTOCOL
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