Which of the following attributes apply to Tier $3$ service providers?

Select all that apply

Question $12$Select one or more:

a$.$

Act as regional ISPs

b$.$

Act as national ISPs

c$.$

Provide access to local and regional ISPs

d$.$

Provide access to local ISPs but not to regional ISPs

e$.$

Also known as backbone ISPs

f$.$

Have no upstream ISPs

g$.$

Provide access to national ISPs

h$.$

Act as local ISPs

i$.$

Provide access to end users only

j$.$

Use local ISPs for upstream connectivity

k$.$

Use national ISPs for upstream connectivity

l$.$

Use either national or regional ISPs for upstream connectivity