The NAT router maps private IP addresses to the devices on the home network. It translates these private IP addresses into a single public IP address during the sessions over the internet. The figure above shows the link between two networks when using NAT. The external network has an external interface, which connects directly with the internet, while in the internal interface (or private side), all resources are hosted on an internal network. A device within the network only needs one public IP address; the router assigns one based on its own configuration settings. You can bind a single service to multiple virtual servers of a NetScaler appliance.
Before claiming an IP address, the client will broadcast an ARP request, in order to find if there is another host present in the network with the proposed IP address. If there is no reply, this address does not conflict with that of another host, so it is free to be used. On large networks that consist of multiple links, a single DHCP server may service the entire network when aided by DHCP relay agents located on the interconnecting routers. Such agents relay messages between DHCP clients and DHCP servers located on different subnets.
Sử dụng loopback để truy cập dịch vụ mạng trên cùng một máy tính
After extensive discussion it was decided to base IPng on IP but add a much larger address space and improvements such as a simplified main header and extension headers. IPv6 is described initially in RFC 2460,
Internet Protocol, Version 6 (IPv6) Specification, issued by the Internet Engineering Task Force (IETF). Further RFCs describe the architecture and services supported by IPv6. IPv6 Unicast Addresses are single node or single interface ip addresses. When we send a traffic to a unicast address, this traffic is sent only to that node or interface. So each host can build its own tables including a table of 192.26.78.103 next-hops to be used. The anycast feature provided by IPv6 is the mode of packet routing.
- In the early 1990s, the IETF realized that a new version of IP would be needed, and the Task Force started by drafting the new protocol’s requirements.
- By contrast, GPRS offered data rates of up to 86kbit/s in the 2G network.
- Figure 7 shows the 6to4 automatic tunneling network with OSPF on the IPv4 network and OSPFv3 on the IPv6 network.
- CSD was later enhanced to HSCSD (High-Speed Circuit Switched Data).
Otherwise, the attribute must be provided by users and administrators with the possibility to also make the attribute required only for users or administrators as well as based on the scopes requested by clients. Allows you to define a list of scopes to dynamically enable an attribute.