What is typically a concern for a service provider when attempting to establish an ADSL subscriber link

a. local loop length between the subscriber and central office (CO)

b. removal of loading coils from the local loop

c. the number of splices and their impact on signal reflection within the local loop

d. all of the above are concerns

What is the function(s) associated with the DSLAM (DSL Access Multiplexer)?

		a. aggregates upstream data from users to the network
		b. demultiplexes downstream data to the users
		c. contains the variable rate ADSL modem card for communications to each user
		d. all of the above