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Q&A 325
33
How many IP addresses could be assigned in each subnet of 10.0.0.0, assuming that a
mask of 255.255.255.0 is used? If the same (static) mask is used for all subnets, how many
subnets are there?
34
How many IP addresses could be assigned in each subnet of 220.8.7.0, assuming that a
mask of 255.255.255.240 is used? If the same (static) mask is used for all subnets, how
many subnets are there?
35
How many IP addresses could be assigned in each subnet of 140.1.0.0, assuming a mask
of 255.255.255.248 is used? If the same (static) mask is used for all subnets, how many
subnets are there?
36
Create a minimal configuration enabling IP on each interface on a 2501 router (two serial,
one Ethernet). The NIC assigned you network 8.0.0.0. Your boss says you need at most
200 hosts per subnet. You decide against using VLSM. Your boss also says to plan your
subnets so that you can have as many subnets as possible rather than allow for larger
subnets later. You decide to start with the lowest numerical values for the subnet number
you will use. Assume that point-to-point serial links will be attached to this router and that
RIP is the routing protocol.
37
In the previous question, what would be the IP subnet of the link attached to serial 0? If
another user wanted to answer the same question but did not have the enable password,
what command(s) might provide this router's addresses and subnets?
38
Describe the question and possible responses in setup mode when a router wants to know
the mask used on an interface. How can the router derive the correct mask from the
information supplied by the user?
39
Name the three classes of unicast IP addresses and list their default masks, respectively.
How many of each type could be assigned to companies and organizations by the NIC?
40
Describe how TCP performs error recovery. What role do the routers play?
41
Define the purpose of an ICMP redirect message.
42
Define the purpose of the trace command. What type of messages is it sending, and what
type of ICMP messages is it receiving?
43
What does IP stand for? What does ICMP stand for? Which protocol is considered to be
Layer 3 equivalent when comparing TCP/IP to the OSI protocols?
44
What causes the output from an IOS ping command to display "UUUUU?"
45
Describe how to view the IP ARP cache in a Cisco router. Also describe the three key
elements of each entry.
46
How many hosts are allowed per subnet if the subnet mask used is 255.255.255.192? How
many hosts are allowed for 255.255.255.252?
ch05.fm Page 325 Monday, March 20, 2000 5:06 PM