Netzwerke

wide-area packet-switched network with distributed control and one of the first computer networks to implement the TCP/IP protocol suite. Both technologies became the technical foundation of the Internet.

The ARPANET was established by the Advanced Research Projects Agency (ARPA) of the United States Department of Defense.

Eng mit dem ARPANET verbunden und kann las eine weiterentwicklung oder ein ableger des ARPANET angesehen werden.

Telnet -Remote programs Host to Host communication.

FTP- File Transfer Protocol used for transferring files from one host to another.

SMTP- Simple Mail Transfer Protocol allows emails to be sent and be recived.

Beschreibt grundsetzlich die ubertragung ins Netzwerken.

Netzwerke sind fester bestandteil im alltäglichen Leben.

and they serve as the center of a local area network (LAN).

A network switch connects devices within a network ( LAN) and forwards data packets to and from those devices.

a MAC adress is a hardware adress which is used to identify to the open network.

A router is a device that connects two or more networks.

Manages traffic between these networks by forwards data packets to their intended IP addresses, and allows multiple devices to use the same Internet connection.

There are 2 types of firewalls, Hardware and software.

Hardware Firewalls are reponsible for controlling data traffic between intern and extern networks.

Firewalls, focus on blocking malware and application-layer attacks.

is a unique identifier for use as a network address in communications within a network segment. This use is common in most IEEE 802 networking technologies, including Ethernet, Wi-Fi, and Bluetooth.

Within the OSI model, MAC addresses are used in the medium access control protocol sublayer of the data link layer.

48 Bytes

2 groups - Manufacturer and Hardware

Request - Response Protocol

a protocol that connects an IP adress to a fixed PC, in a LAN.

primarily assigned by device manufacturers, and are therefore often referred to as the burned-in address, or as an Ethernet hardware address, hardware address, or physical address.

Erreichbarkeit eines Host im Netzwerk.

Fehlerbehebung.

Diagnostic protocol, all IP network devices have the capability to send, recieve and process ICMP messages.

ICMP - Network administrators, to troubleshoot internet connetions/hops.

Ping - (ECHO anforderung und ECHO Antwort) Erreichbarkeit eines bestimmtes Hosts im netzwerk zu testen.

(Collects infomation).

Traceroute - den Datenpakete von einem Host zu einem anderen netzwerk zunehmen.

(Helps admin locate a source of a network delay.)

Zugriffsverfahren das in Ethernet-Netzweken verwendet wird, dient kollisionen zu vermeiden und effiziente nutzung des übertragungsmediums zu ermöglichen.

Reciever and Sender service

Ethernet Frame ist eine grundlegende Struktur für die Übertragung von Daten über Ethernet.

WLAN - Wireless Local Area Network

WMAN - Wireless Metropolitan Acess Network

WPAN - Wireless Personal Area Network

WWAN - Wireless Wide Area Network

Bus Topologie

Ring Topologie

Stern Topologie

Baum Topologie

Die wegzu finden, ein router zum nachste router.

TCP - VERBINDUNGSORIENTIERT

zuverlässige und sequenzielle Datenubertragen, websiten anrufen, dateiübertragung und E-mail.

UDP - VERBINDUNGSLOS

Höher geschwindigkeit wichtiger als Zuverlässigkeit. voice over IP, videostreaming, online spiele, DNS - Verbindloses protocol.

Private Netz (LAN)

Klasse A - 10.0.0.0 -10.0.255.255

Klasse B - 172.16.0.0 - 172.16.255.255

Klasse C - 192.168.1.0 - 192.168.255.255

First - Netz Id

Last - Netz Braodcast

vergibt automatisch IP adresse, subnetzmaske und Standard Gateways.

verbunden mit Switch

Relay agent - hardware - in ein andere netzteil