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The Secret Project

In: Historical Events

Submitted By turtleman
Words 380
Pages 2
* TCP/IP Model * Model * Application * HTTP, POP3, SMTP * the application layer provides an interface between software running on a computer and the network itself * Transport * TCP and UDP * Segments * Transport layer protocols provide services to the application layer protocols that reside one layer higher in the TCP/IP model * Network * IP * Packets * Data Link * Frames * The term link refers to the physical connections, or links, between two devices and the protocols used to control those links * Physical * Layer interaction * Adjacent on same computer * Layer requests that layer directly below it assists with process * Same layer interaction between two computers * The two computers use a protocol (an agreed-to set of rules) to communicate with the same layer on another computer * Cabling * Crossover cable: If the endpoints transmit on the same pin pair * Straight-through cable: If the endpoints transmit on different pin pairs * Transmits on pins 1 and 2 * PC NICs, Routers, Wireless access points * Transmits on pins 3 and 6 * Switches, hubs * WAN technologies * Leased lines * 256 Kbps in the US * IP Addressing * ARP dynamically learns the data link address of an IP host connected to a LAN * IP addresses 32 bits long * Protocols and Addresses * MAC- 6 bytes or 48 bits long * Routing protocols * IGP- interior gateway protocol: designed and intended for use inside a single autonomous system * OSPF-Open Shortest Path First * Metric: Cost- The sum of all interface cost settings for all links in a route, with the cost defaulting to be based on interface bandwidth * EIGRP- Enhanced Interior Gateway Routing Protocol * Metric: Composite of bandwidth and delay- Calculated based on the route’s slowest link and the cumulative delay associated with each interface in the route * RIP-2- Metric: Hop count- The number of routers (hops) between a router and the destination subnet * EGP- exterior gateway protocol: designed and intended for use between different autonomous systems

Table 2-1 Examples of Types of Ethernet
Speed Common Name Informal IEEE
Standard Name
Formal IEEE 10 Mbps | Ethernet | 10BASE-T | 802.3 | Copper, 100 m | 100 Mbps | Fast Ethernet | 100BASE-T | 802.3u | Copper, 100m | 1000 Mbps | Gigabit Ethernet | 1000BASE-LX | 802.3z | Fiber, 5000m | 1000 Mbps | Gigabit Ethernet | 1000BASE-T | 802.3ab | Copper, 100m | 10 Gbps | 10 Gig Ethernet | 10GBASE-T | 802.3an | Copper, 100m |

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