ISOC and SSL Flashcards
Responsibilities of IETF
Applications Area, Internet Area, Network Management, OSI integration, Routing area, Security Area, Transport and service area
IETF
Internet Engineering Task Force
IANA
Internet Assigned Number Authority
Responsibilities of IANA
Coordinate assigned values of protocol parameters, Type codes, Protocol numbers, Port numbers, Internet addresses and Standards
IRTF
Internet Research Task Force
Responsibilities of IRTF
End to End research, Autonomous networks, Electronic libraries, Internet Architecture, Electronic Communities, Resource discovery
TCPIP Architecture Design
Layered design, makes it easier for future developments.
3 Levels of TCPIP Architecture
Connectionless Oriented Delivery (IP, Network Layer). Transport Layer Services (using IP). Highest Level is Application layer service
IETF RFC791 IPV4
Routing layer diagram of the TCP IP suite. IP frame header contains routing info and control info associated with datagram delivery.
IPv6 / IPnG
Increases address size from 32bits to 128 to support more levels of addressing. Adds scalability of multicast addresses.
Anycast address
sends a packet to a group of nodes. added with ipv6.
Advantages of IPv6
Efficient Formatting, Less Stringent Limits, Greater Flexibility. Support for extensions in headers.
TCPIP Addressing Scheme (IPv4)
Nodes connected to IP network. 32 bit addresses. IP contains NetID and HostID.
TCPIP Address Classes
IP Address spaces are divided into fixed length structures called address classes.
Class A
First bit of IP is 0. From 1.0.0.0 to 126.0.0.0
Class B
First two bits of IP are 1 0. From 127.0.0.0 to 191.255.0.0
Class C
First 3 bits are 1 1 0. 3 Bits for address class, 21 for network, 8 for host.
Class D
first 4 bits are 1 1 1 0. Multicast address not a specific network. ex. Video Conferencing
Class E
first 4 bits are 1 1 1 1. Special Reserved address. Doesn’t refer to specific networks. No numbers currently assigned in this range.
Subnetting
Provides a way to extend network portion of IP beyond allocated bits. Uses a mask to host address to access subnetworks.