Chapter 8

If I simplify the address 2001:0000:0000:00fe:0000:0000:0000:cdef, I get ________. A) 2001:0:0:fe::cdef B) 2001::fe:0:0:0:cdef C) 2001:0:0:fe:0:0:0:cdef D) 2001::00fe:0::cdef

A) 2001:0:0:fe::cdef

Router sockets for wire and optical fiber cords are called ________. A) interfaces B) sockets C) ports D) plugs

A) interfaces

If no other row matches, the router will select the ________ row as its best match. A) last B) depending on the circumstances C) first D) none is correct

A) last

The Internet is organized in a _____________. A) mesh B) hierarchy C) none is correct D) ring

A) mesh

An internal router only connects different IP ________. A) subnets B) networks C) Both A and B D) Neither A nor B

A) subnets

A router will discard a packet if the Time to Live (TTL) value in an arriving packet is ________. A) 0 B) 1 C) 254 D) 256

B) 1

In a routing table, Row 47 and 3497 both match the destination IP address of an arriving packet's IP address. What row will the router look at first when trying to find matching rows? A) 3497 B) 1 C) 47 D) the default row

B) 1

A boarder router connects different IP _____________. A) none is correct B) networks C) subnets & networks D) subnets

B) networks

In the mask 255.255.255.0, how many 1s are there? A) 8 B) 16 C) 24 D) None of the above

C) 24

In IPv4, the ____________ field is used to deal with congestion in the Internet. A) header checksum B) time to live C) ECN D) DiffServ

C) ECN

If the next-hop router field in the best-match row says "local", the router should address the packet to the ________. A) local router B) default router C) destination host D) none of the above.

C) destination host

For cost reasons, you should ________ where you can, ________ where you must. A) route; switch B) switch; switch C) switch; route D) route; route

C) switch; route

There is a row for each host address in a(n) ________. A) none is correct B) modem table C) routing table D) ethernet switching table

D) ethernet switching table

Express the mask /18 in dotted decimal notation. A) 255.0.0.0 B) 255.255.0.0 C) 255.255.255.0 D) none of the above

D) none of the above