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25 Cards in this Set
- Front
- Back
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TCP/IP |
Transmission Control Protocol / Internet protocol. Basic communication language of the internet/private network. Layers: Application Transport Internet Network |
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IP address |
Internet protocol adress. Made of 4 octets 0-255. Always paired with subnet mask and sometimes a default gateway. |
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Subnet Mask |
Tells what numbers are the network and what at the host. 255=network. 0=host. |
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Default gateway |
Node thay is assumed to know how to forward packets to other networks. Usually the router IP address. |
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ARP |
Address resolution protocol. Broadcast to figure out which computer had needed IP to gain MAC address. Only worked withing local network. Router will stop braodcasts. |
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Class A IP address |
1-126. Subnet mask: 255.0.0.0 Private: 10.0.0.0-10.255.255.255 |
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Class B IP Address |
128-191. Subnet mask: 255.255.0.0 Private: 172.16.00-172.31.255.255 |
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Class C IP address |
192-223. Subnet mask : 255.255.255.0 Private: 192.168.0.0-192.168.255.255 |
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127.0.0.1 |
Loop back host. |
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TCP three way handshake |
Host will send packet and receives an acknowledgement before sending the next. Sequential sending. Host: SYN(cronization): 300 Dest: SYN:50 / ACK: 400 Host: SYN: 400 / ACK: 51 |
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TCP windowing |
Sending as many packets as able. Sends 1: successful Sends 2: successful Sends 4: successful Sends 8: drops two. Sends 6: successful Sends 6: successful |
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Port Number |
Endpoint of communication. Always associated with IP address (after the colon) so it knows what application to send to. |
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Port number for SMTP |
Port 25 TCP |
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Port for FTP |
Port 21 TCP control Port 20 TCP data |
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Port Number for SSH |
Port 22 TCP |
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Port Number for telnet |
Port 23 TCP |
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Port for DNS server |
Port 53 TCP |
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Port for HTTP |
Port 80 TCP |
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Port for pop3 |
Port 110 TCP |
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Port for HTTPS |
Port 443 TCP |
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Port for DNS client |
Port 53 UDP |
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Port for TFTP. |
Port 69 UDP |
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TFTP |
Trivial file transfer protocol. |
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Source port |
Dynamic port number. Computer creates unique ports depending on what is open and running. |
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ICMP (Internet control message protocol) |
Typically used for diagnostic or troubleshooting. Starts after ipv4 header. Sends error messages. |
