Term 1
ACL for Routing Protocols
An ACL for Routing Protocols is a set of rules used to filter routing updates between routers, controlling which network routes are advertised or accepted to improve security and stability.
Acronym study
Terms 1–30 of 45 300-410 acronyms and key terms. Each entry includes a plain-English definition and a link to the full 800-word glossary page with exam context and practice questions.
Term 1
An ACL for Routing Protocols is a set of rules used to filter routing updates between routers, controlling which network routes are advertised or accepted to improve security and stability.
Term 2
Administrative distance manipulation is the practice of changing the trustworthiness value that a router uses to choose between different routing protocols when more than one provides a route to the same destination.
Term 3
BGP communities are tags attached to routes that allow routers to apply common policies across networks without manual per-route configuration.
Term 4
BGP Confederations divide a large autonomous system into smaller internal sub-autonomous systems to reduce the full mesh requirement of Internal BGP while still acting as a single AS to external peers.
Term 5
A security feature that uses an MD5 password to verify and protect BGP routing updates between neighboring routers.
Term 6
BGP Prefix Filtering is the practice of controlling which network routes (prefixes) a router accepts or advertises to its BGP neighbors, preventing unwanted or harmful routes from spreading across the internet.
Term 7
BGP Route Aggregation is a technique that combines multiple specific network routes into a single summary route to reduce the size of routing tables and improve network efficiency.
Term 8
A BGP Route Reflector is a networking device that reduces the number of BGP peer connections needed in a large network by allowing routers to share routing information without needing to connect to every other router directly.
Term 9
BGP TTL Security is a feature that protects Border Gateway Protocol sessions by verifying that incoming BGP packets have a Time-to-Live value of 255, ensuring they come from a directly connected neighbor and not from a remote attacker.
Term 10
Control Plane Policing is a Cisco security feature that protects a router or switch by rate-limiting the traffic that the device's processor must handle, preventing it from being overwhelmed.
Term 11
A DHCP client is any device that requests network configuration settings from a DHCP server, which automatically assigns IP addresses and other parameters to devices on a network.
Term 12
A DHCP relay configuration allows a router to forward DHCP broadcast requests from clients on one subnet to a DHCP server on a different subnet, enabling centralized IP address management across multiple networks.
Term 13
DMVPN Phase 1 is a Cisco networking technology that lets branch offices securely connect to a central hub using a single tunnel, even when they have changing public IP addresses.
Term 14
DMVPN Phase 2 is an advanced Cisco routing technology that allows spoke routers to communicate directly with one another without sending traffic through a central hub, using dynamic routing protocols and multipoint GRE tunnels.
Term 15
DMVPN Phase 3 is a Cisco networking technology that allows branch offices to connect directly to each other without always going through a central hub, but with smarter routing that lets the hub control the traffic paths more efficiently.
Term 16
EIGRP authentication is a security feature that verifies the identity of routers exchanging routing information to prevent unauthorized or malicious updates.
Term 17
EIGRP route summarization is a technique that combines multiple specific network routes into one summary route to reduce routing table size and improve network stability.
Term 18
EIGRP stub routing is a feature that restricts a router from learning routes from neighbors and limits the routes it advertises, improving network stability and reducing resource usage in remote or spoke locations.
Term 19
FlexVPN is a Cisco VPN solution that combines multiple VPN technologies (site-to-site, remote access, and hub-and-spoke) under a single, modular framework based on IKEv2.
Term 20
Group Encrypted Transport VPN is a Cisco technology that secures IP multicast and unicast traffic across a wide area network using a shared security association rather than point-to-point tunnels.
Term 21
IP SLA for Path Control is a Cisco technology that uses active network measurements to dynamically influence routing decisions and redirect traffic along a preferred path when network conditions change.
Term 22
IPsec DMVPN is a Cisco technology that combines Dynamic Multipoint VPN with IPsec encryption to securely connect multiple branch offices to a central hub over the internet without needing permanent tunnels.
Term 23
IPv6 Next Hop Resolution is the process a router uses to determine the next router or destination device to which a packet should be forwarded, based on the destination IPv6 address and the routing table.
Term 24
EIGRPv6 is the version of the Enhanced Interior Gateway Routing Protocol that routes IPv6 traffic, enabling routers to exchange IPv6 network information dynamically.
Term 25
OSPFv3 is a routing protocol that lets routers share information about how to reach destinations in an IPv6 network, updating routes automatically as the network changes.
Term 26
LDP, or Label Distribution Protocol, is a protocol that routers use to automatically exchange labels that enable MPLS (Multiprotocol Label Switching) to create fast, efficient paths for data packets across a network.
Term 27
A security feature that restricts which interfaces and IP addresses can be used to manage a network device, protecting the control plane from unauthorized administrative access.
Term 28
MP-BGP for VPN is an extension of the Border Gateway Protocol that carries multiple types of network layer information to enable scalable, isolated virtual private networks over a shared provider infrastructure.
Term 29
MPLS Label Distribution is the process by which routers exchange labels that tell them how to forward packets across a network without looking at the IP address each time.
Term 30
An MPLS Layer 2 VPN is a virtual private network technology that connects two or more customer sites at the data link layer, allowing them to communicate as if they were on the same local Ethernet segment, while using a service provider’s MPLS backbone.