Consider the services and the functionality provided by the Network Layer to mark true$/$correct assertion$($s$)/$statement$($s$).$

A$.$ Network Layer provides reliable data transfer service between end$-$systems using control plane protocols.

B$.$ Network Layer is present on all the systems connected to the Internet.

C$.$ Routers forward datagrams considering destination adapter$-$Id$.$

D$.$ Forwarding Table entries on routers are constantly updated with the information provided by incoming IPv. $4$ datagrams.

E$.$ Static routing requires the configuration of Forwarding Tables with the paths leading to downstream subnets.