Sabtu, 21 Januari 2012

CCNA 4 - Chapter 4

1 A network engineer is implementing a network design using VLSM for network
192.168.1.0/24. After subnetting the network, the engineer has decided to take one of the subnets, 192.168.1.16/28 and subnet it further to provide for point-to-point serial link addresses. What is the maximum number of subnets that can be created from the 192.168.1.16/28 subnet for serial connections?
#4


2 When
running NAT, what is the purpose of address overloading?

#allow multiple inside addresses to share a
single global address


3 What two advantages does CIDR provide to a
network? (Choose two.)

#dynamic address assignment
#reduced routing update traffic


4 How does a router keep track of which inside
local address is used when NAT overload is configured?

#The router uses TCP or UDP port numbers.

5 What is a characteristic of a classful
routing protocol on the network?

#Updates received by a router in a different
major network have the default mask applied.


6 Refer to the exhibit. Which address is an
inside global address?

#198.18.1.55

7 Refer to the exhibit. All networks that are
shown have a /24 prefix. Assuming that all routes have been discovered by
all routers in the network, which address will successfully summarize only
the networks that are shown?

#192.168.16.0/21


8 What is the CIDR prefix designation that summarizes the entire reserved
Class B RFC 1918 internal address range?

#/16

9 Which NAT term refers to the IP address of
your inside host as it appears to the outside network?

#inside local IP address

10 A network administrator is asked to design
a new addressing scheme for a corporate network. Presently, there are 500
users at the head office, 200 users at sales, 425 at manufacturing, and 50
at the research site. Which statement defines the correct VLSM addressing
map with minimal waste using the 172.16.0.0/16 network?


#172.16.2.0/23 head office

172.16.4.0/23 manufacturing

172.16.6.0/24 sales


172.16.7.0/26 research




11 A company using a Class B IP addressing
scheme needs as many as 100 subnetworks. Assuming that variable length
subnetting is not used and all subnets require at least 300 hosts, what
subnet mask is appropriate to use?


#255.255.254.0





12 Host A in the exhibit is assigned the IP address 10.118.197.55/20. How
many more network devices can be added to this same subnetwork?



#4093





13 Refer to the exhibit. RIP version 2 is configured as the network routing
protocol and all of the default parameters remain the same. Which update is
sent from R2 to R3 about the 10.16.1.0/24 network connected to R1?


#10.16.0.0/16



14 What range of networks are summarized by
the address and mask, 192.168.32.0/19?



#192.168.32.0/24 – 192.168.63.0/24



15 Refer to the exhibit. Based on the output
of the show ip nat translations command, which kind of address translation
is in effect on this router?


#overload



16 How many addresses will be available for
dynamic NAT translation when a router is configured with the following
commands?



Router(config)#ip nat pool TAME 209.165.201.23
209.165.201.30 netmask 255.255.255.224


Router(config)#ip nat inside source list 9
pool TAME


#8



17 Refer to the exhibit. Which two IP
addresses could be assigned to the hosts that are shown in the exhibit?
(Choose two.)


#192.168.65.35


#192.168.65.60




18 What are the network and broadcast
addresses for host 192.168.100.130/27? (Choose two.)


#network 192.168.100.128



#broadcast 192.168.100.159




19 Refer to the exhibit. Which two are valid
VLSM network addresses for the serial link between Router1 and Router2?
(Choose two.)


#192.168.1.4/30



#192.168.1.8/30






20 When configuring NAT on a Cisco router, what is the inside local IP
address?


#the IP address of an inside host as it appears
to the inside network