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Network #9 [L3]

From 4.1

TermDefinition
Host Any device that has an IP address. Host has TCP/IP network stack and can handle TCP/IP services. They are computing devices and can be servers/clients
Network layer Controls the transportation of individual packets going from the source host to the destination host. PDU - Packet. Address - Logical address / IP address
Internet Protocol(IP) address A unique address that identifies a host/device on the internet or a local network. IPv4 is 32 bit, 2³²
Packetizing Encapsulation and decapsulation in network layer PDU
Packet Switching The router is a switch that creates a connection between an input and output port. In TCP/IP model, network layer provides a connectionless service. Each pack is treated independently
Router A physical or virtual internetworking device that forwards data packets between computer networks. Connects two incompatible networks
Regional Internet Registry Allocates unique IP addresses to organizations
IPv4 addressing notations Dotted Decimal notation, IPv4 subnet masks, and Classless Inter-Domain Routing (CIDR)
Classful Addressing IP addressing method that categorizes IP addresses into fixed classes (A, B, C, etc.) with default subnet masks
Subnetting subnetworks. All subnets have sizes in power of 2 (4, 8, 16, etc). It increases security, performance, and simplifies troubleshooting
Dotted Decimal notation Decimal numbers separated by dots (128.11.3.31)
IPv4 subnet masks Used to divide an IP address into two parts, one part identifies the host, the other identifies the network it belongs to. Written in dotted decimal notation (255.255.255.0)
Classless Inter-Domain Routing (CIDR) Represents IP addresses along with a suffix at the end specifying the network prefix length (192.168.1.1/24)
Information Extraction in Classless addressing 1. Number of address in the block 2. First address of the block (aka Subnet ID) 3. Last address of the block (aka Broadcast address for the subnet)
Created by: jolly_n4
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