System Core Network

Packet Capture

Key Points Packet Capture is defined for network or system use Recording packets for later inspection and analysis Used in operational and architecture contexts Supports debugging, traffic analysis, and security investigation Gives operators direct evidence of what traversed the network…

Leaking Transit

Key Points Refers to route or traffic leakage outside intended policy boundaries Occurs in inter-domain or policy-based routing contexts Can create reachability or policy problems Relevant in provider and enterprise network design Used in BGP and other inter-domain routing environments…

Virtual Private Cloud

Key Points Creates isolated cloud networking space Used within public cloud platforms Supports private addressing and segmentation Common in enterprise cloud architectures Provides private addressing, routing control, and security segmentation within a provider’s cloud environment Definition Virtual Private Cloud is…

OSPF

Key Points Used for interior routing within a single routing domain Builds a topology view from link-state advertisements Supports fast convergence in routed networks Common in enterprise and service provider networks Routers compute shortest paths using shared topology information Definition…

Default Route Propagation

Key Points Default Route Propagation is a defined network term or function Distribution of a default route for fallback forwarding across a routing domain Used across network and system contexts Simplifies forwarding when detailed destination routes are not available Reduces…

Distance Vector Routing

Key Points Routers exchange route metrics with neighbors Uses iterative updates to build routing knowledge Simple to implement but sensitive to convergence issues Common in classic routed networks Depends on neighbor-based metric exchange and iterative convergence Susceptible to routing loops…

Subnet Mask

Key Points Separates network and host bits Used in IPv4 subnetting Supports routing and address planning Related to CIDR prefix length Enables devices and routers to determine which part of the address identifies the subnet and which part identifies the…

Availability

Key Points Measures readiness for use and operational continuity Commonly expressed as uptime or service accessibility Depends on reliability and recovery design Important in infrastructure and service planning Influenced by redundancy, recovery, maintenance, and fault handling Applies across cloud services,…

IP Address

Key Points Identifies a network interface logically Used for packet forwarding and reachability Exists in IPv4 and IPv6 forms Supports routing across interconnected networks Definition An IP Address is a logical address assigned to a network interface in an IP…

Multicast

Key Points One-to-many-to-selected-receivers model Used in streaming and network distribution More efficient than multiple unicast copies Requires group membership or subscription Differs from broadcast by limiting to subscribed receivers only Differs from unicast by eliminating per-receiver sender replication Definition Multicast…