1/14/2024 0 Comments Neorouter routable ip addressesport forwarding with _, computers outside the network can request a service using the public IP address of the router and the port number of the desired service port forwarding you can use _ to hide a service hosted inside your network by changing the default port number for that service dynamic NAT (DNAT) with _ many computers can share a pool of routable IP addresses that number fewer than the computers dynamic NAT Type of NAT in which many computers can share a pool of routable IP addresses that number fewer than the computers. port forwarding Preventing the passage of any IP packets through any ports other than the ones prescribed by the system administrator. NAT table when an internal machine initiates a session with an external machine such as a web browser accessing a website, the source and destination IP addresses and port numbers for the TCP segment or UDP datagram are recorded in the _ and the private IP addresses are swapped for the public IP addresses on each packet NAT translation table the router compares the incoming destination port and source IP address to the entry in the _ to determine which IP address to put back on the packet outgoing relying on PAT for network address translation works only for _ communication SNAT, DNAT for traffic originating outside the network to acccess an internal machine such as a web server hosted inside your network (aka incoming communication), you cannot use PAT, you have to use _ or _ static NAT (SNAT) maps a single routable (not private) IP address to a single machine, enabling you to access that machine from outside the network port forwarding Forwards an external network port to an internal IP address and port. Interface tells the router which of its ports to use default route is important because it tells the router exactly what to do with every incoming packet unless another line on the routing table gives another route isolated internetworks, tier one backbone two places where routers do not have default routes: node every _ on the network has a routing table routing table every packet sent out of your computer uses the _ to figure out where the packet should go, whether directly to a node on your network or to a gateway metric a relative value that defines the cost of using this route dynamic routing protocols with _ the routers determine the proper metric for each route loopback address the 2nd-4th lines of the routing table will tell your system how to handle the _ local connection the 5th line of the routing table will define the _ network technologies routers enable you to use different types of _ IP packets the only common feature between various networking technologies is that they all carry _ inside their layer 2 encapsulation network address translation (NAT) routers running some form of _ hide the IP addresses of computers on the LAN but still enable those computers to communicate with the broader internet network address translation (NAT) Translates the private IP address to a public address for routing over the Internet NAT replaces the source IP address of a computer with the source IP address from the outside router interface on outgoing packets port address translation (PAT) the most common form of NAT that handles one to many connections, uses port numbers to map traffic from specific machines in the network port address translation (PAT) A variation of network address translation (NAT) that assigns a different TCP port number to each packet.
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