Term 601
OSPF authentication
OSPF authentication is a security mechanism that verifies the identity of routers exchanging routing information within an OSPF network, preventing unauthorized or malicious routing updates.
Acronym study
Terms 601–630 of 1033 N10-009 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 601
OSPF authentication is a security mechanism that verifies the identity of routers exchanging routing information within an OSPF network, preventing unauthorized or malicious routing updates.
Term 602
OSPF cost is a metric used by the Open Shortest Path First routing protocol to determine the best path for data packets to travel through a network, based on the characteristics of each link.
Term 603
OSPF metric is a cost value assigned to each route in an Open Shortest Path First network, used to determine the best path for data packets.
Term 604
An OSPF neighbor is another router that has been directly discovered through OSPF Hello packets and is willing to exchange routing information to build a network topology map.
Term 605
OSPF network type defines how the Open Shortest Path First routing protocol operates on a given interface, determining neighbor discovery, adjacency formation, and the election of designated routers.
Term 606
OSPFv2 is a network routing protocol that helps routers share information about the best paths to send data across an IP network.
Term 607
OSPFv3 is the version of the Open Shortest Path First routing protocol that supports IPv6 networks, enabling routers to exchange routing information for IPv6 addresses.
Term 608
Operational Technology (OT) is hardware and software that monitors and controls physical devices, processes, and infrastructure in industrial environments.
Term 609
Out-of-band refers to a separate, dedicated network path used for managing and configuring IT devices, distinct from the main data traffic path.
Term 610
An Outbound ACL is a set of rules applied to traffic leaving a network interface that decides which packets are allowed to exit and which are blocked.
Term 611
AWS Outposts is a fully managed service that extends AWS infrastructure, services, and tools to virtually any on-premises data center or co-location space for a truly consistent hybrid cloud experience.
Term 612
An output device is any piece of computer hardware that displays, prints, or otherwise conveys information from a computer to a user.
Term 613
An Outside global address is the publicly routable IP address assigned to a device on the external network (usually the internet) as seen from the perspective of a network device performing Network Address Translation (NAT).
Term 614
Outside local is the IP address that a device on the inside of a private network appears to have from the perspective of hosts located outside the network, typically after Network Address Translation (NAT) has been applied.
Term 615
Platform as a Service (PaaS) is a cloud computing model that provides a managed platform for developers to build, run, and manage applications without dealing with the underlying infrastructure.
Term 616
A packet is a small unit of data that is sent over a network, containing both the actual data and control information for delivery.
Term 617
Packet capture is the process of intercepting and recording data packets traveling over a computer network for analysis.
Term 618
Packet loss is the failure of one or more data packets to reach their destination across a network, resulting in missing or incomplete data transfers.
Term 619
Port Aggregation Protocol (PAgP) is a Cisco proprietary protocol that automatically bundles multiple physical Ethernet links into a single logical link to increase bandwidth and provide redundancy.
Term 620
A Personal Area Network is a small network used for connecting devices close to one person, usually within a range of about 10 meters.
Term 621
Partner Interconnect is a Google Cloud service that allows you to connect your on-premises network to Google Cloud through a supported third-party service provider.
Term 622
A passive interface is a network interface that participates in a routing protocol (like OSPF) by listening for and learning routes, but does not send routing protocol messages out of that interface.
Term 623
PAT (Port Address Translation) is a method of network address translation that maps multiple private IP addresses to a single public IP address by using different port numbers for each connection.
Term 624
A short, flexible cable used to connect electronic devices to each other or to a network, often temporarily or for testing.
Term 625
A patch panel is a mounted hardware unit with ports that connect incoming and outgoing network cables, serving as a central point for organizing and managing cable connections.
Term 626
Path cost is a numerical value assigned to each network path used by the Spanning Tree Protocol to determine the most efficient route and prevent loops in a switched network.
Term 627
PCI (Peripheral Component Interconnect) is a standard bus interface used in computers to connect hardware devices like graphics cards, network adapters, and storage controllers to the motherboard.
Term 628
PCI Express (PCIe) is a high-speed interface standard that connects components like graphics cards, SSDs, and network cards to a computer's motherboard.
Term 629
A PDU distributes electrical power to multiple devices in a data center, often with monitoring and remote control capabilities.
Term 630
A PDU (Protocol Data Unit) is the unit of data at a specific layer of the OSI or TCP/IP model, containing both header and payload information as it travels across a network.