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901 - 2.0 Networking (*Soho Wireless
802.11 Wireless Technologies
2.4…
901 - 2.0 Networking
*Soho Wireless
802.11 Wireless Technologies
2.4 GHz and 5 Ghz
Use Carrier Sense Multiple Access / Collision Avoidance CSMA / CA
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Network address translation (NAT) is a method of remapping one IP address space into another by modifying network address information in Internet Protocol (IP) datagram packet headers while they are in transit across a traffic routing device.
Dynamic NAT, just like static NAT, is found within larger corporations with complex networks. The way dynamic NAT differs from static NAT is that where static NAT provides a one-to-one internal to public static IP address mapping, dynamic NAT doesn't make the mapping to the public IP address static and usually uses a group of available public IP addresses.
Port forwarding
In computer networking, port forwarding or port mapping is an application of network address translation (NAT) that redirects a communication request from one address and port number combination to another while the packets are traversing a network gateway, such as a router or firewall. This technique is used to make services on a host residing on a protected (internal) network available to hosts on (external network), by remapping the destination IP address and port number of the communication to an internal host.
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2.4 - Explain common TCP and UDP ports, protocols and their purpose.
Common TCP ports
21 – FTP- Send and receives files between systems
- 22 – SSH- Encrypted access
- 23 – TELNET- Incecure access
- 25 – SMTP- Transfer email between servers
- 53 – DNS- Conver domain names to IP Addresses
- 80 – HTTP- Web server communication
- 110 – POP3- Receives Emails into a email client
- 143 – IMAP- A newer email client protocol
- 443 – HTTPS- Communications with encryption
- 3389 – RDP- Displays remote devices
- 137-139 – NetBIOS/NetBT- Register remove and find services
- 445 – SMB/CIFS-Windows file transfers and printer sharing
- 427 – SLP-Mac OS services by name
- 548 – AFP-Mac OS file transfers
Protocols
DHCP- Automate an IP Address configuration
- DNS- Converts Domain Names to IP Addresses
-SNMP- : Manage Network devises
- SMTP- Transfers Emails between Mail Servers
- SMB- windows Files Transfers and Printers Sharing
- SSH-encrypted acces
- AFP- mac operating system file
-LDAP - Directory Service Protocol- single sign on
1.9 Given a scenario ,select the appropriate components for a custom PC configuration to meet customer specifications or needs.
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