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Why is DHCP over UDP?
The very first message DHCP sends is DISCOVER which is a broadcast message as the client has no idea what DHCP server’s IP address is. TCP doesn’t support broadcasts. So we use UDP. Because it cannot use TCP.
Why do DNS and DHCP run on top of UDP rather than TCP?
1) UDP is much faster. TCP is slow as it requires 3-way handshake. DNS servers (since they use UDP) don’t have to keep connections. 2) DNS requests are generally very small and fit well within UDP segments.
Why does DNS use UDP instead of TCP?
Here is why DNS uses UDP. UDP is much faster when compared to TCP. TCP is slow as it uses 3-way handshake. DNS requests are generally very small and they fit well within UDP segments. UDP is not reliable, but reliability can be added to the application layer.
Does DHCP need TCP?
DHCP allows hosts to obtain required TCP/IP configuration information from a DHCP server. Windows Server 2016 includes DHCP Server, which is an optional networking server role that you can deploy on your network to lease IP addresses and other information to DHCP clients.
Is port 67 UDP or TCP?
DHCP messages that a client sends to a server are sent to well-known port 67 (UDP—Bootstrap Protocol and DHCP).
Is DHCP UDP or TCP?
DHCP uses User Datagram Protocol (UDP), RFC 768, as its transport protocol. DHCP messages that a client sends to a server are sent to well-known port 67 (UDP—Bootstrap Protocol and DHCP).
Why does the DHCP server not use TCP?
The client cannot use TCP because it does not have an IP address of its own, nor does it know the DHCP server address. The DHCP server is listening for broadcasts on UDP port 67. Once it receives a dhcp client request, it starts the bootp sequence of passing config information to the client using the MAC address of the client.
Why does a DNS server use UDP instead of TCP?
DNS servers (since they use UDP) don’t have keep connections. 2) DNS requests are generally very small and fit well within UDP segments. 2) UDP is not reliable, but reliability can added on application layer. An application can use UDP and can be reliable by using timeout and resend at application layer.
Why does DHCP use two UDP port numbers?
TCP doesn’t support broadcasts. So we use UDP. The DHCP employs a connectionless service model, It is implemented with two UDP port numbers for its operations which are the same as for the BOOTP protocol. UDP port number 67 is the destination port of a server, and UDP port number 68 is used by the client.
What kind of transport protocol does DHCP use?
DHCP uses UDP as its transport protocol. DHCP messages that a client sends to a server are sent to well-known port 67 (UDP—Bootstrap Protocol and DHCP). DHCP Messages that a server sends to a client are sent to port 68, so can DHCP use TCP ?