The document is a set of 20 multiple choice questions about networking concepts like VLSM, NAT, CIDR, and subnetting. Some of the questions ask about the maximum number of subnets that can be created from a specific subnet, the purpose of address overloading in NAT, the advantages of CIDR, how a router implements NAT overload, and characteristics of classful routing protocols. Other questions provide exhibits with network diagrams and ask about global vs local NAT addresses, valid subnet masks, summarized network ranges, and valid subnet addresses.

1. Cisco Discovery - DRSEnt Module 5 - V.4 in english.
Q.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?
1
2
4
6
8
16
Q.2 When running NAT, what is the purpose of address overloading?
limit the number of hosts that can connect to the WAN
allow multiple inside addresses to share a single global address
force hosts to wait for an available address
allow an outside host to share inside global addresses
Q.3 What two advantages does CIDR provide to a network? (Choose two.)
reduced routing table size
dynamic address assignment
automatic route redistribution
reduced routing update traffic
automatic summarization at classful boundaries

2. Q.4 How does a router keep track of which inside local address is used when NAT overload is
configured?
The router adds an additional bit to the source IP address and maintains a separate table.
The router modifies the QoS field.
The router uses TCP or UDP port numbers.
The router uses a manual entry that is created and maintained in the database of the router.
Q.5 What is a characteristic of a classful routing protocol on the network?
All subnets are seen by all routers.
CIDR addresses are advertised.
A subnet can be further subnetted down and advertised correctly.
Updates received by a router in a different major network have the default mask applied.
Q.6 Refer to the exhibit. Which address is an inside global address?
10.1.1.1
10.1.1.2
198.18.1.55
64.100.0.1
Q.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?
192.168.8.0/21
192.168.8.0/24
192.168.16.0/20
192.168.16.0/21

3. 192.168.16.0/24
Q.8 What is the CIDR prefix designation that summarizes the entire reserved Class B RFC 1918 internal
address range?
/4
/8
/12
/16
/20
Q.9 Which NAT term refers to the IP address of your inside host as it appears to the outside network?
inside global IP address
outside global IP address
inside local IP address
outside local IP address
Q.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?
172.16.0.0/20 head office
172.16.1.0/21 manufacturing
172.16.1.0/22 sales
172.16.3.0/26 research
172.16.48.0/19 head office
172.16.16.0/20 manufacturing
172.16.48.128 sales
172.16.48.0/26 research
172.16.2.0/23 head office

4. 172.16.4.0/23 manufacturing
172.16.6.0/24 sales
172.16.7.0/26 research
172.16.2.0/22 head office
172.16.3.0/23 manufacturing
172.16.4.0/26 sales
172.16.4.128/25 research
Q.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?
255.255.0.0
255.255.240.0
255.255.254.0
255.255.255.0
255.255.255.128
255.255.255.192
Q.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?
253
509
1021
2045
4093
Q.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?

5. 10.16.0.0/16
10.0.0.0/24
10.0.0.0/8
10.16.1.0/24
Q.14 What range of networks are summarized by the address and mask, 192.168.32.0/19?
192.168.0.0/24 - 192.168.32.0/24
192.168.0.0/24 - 192.168.31.0/24
192.168.32.0/24 – 192.168.64.0/24
192.168.32.0/24 – 192.168.63.0/24
Q.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?
static
public
overload
private
Q.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
7
8
9
10
24

6. 31
Q.17 Refer to the exhibit. Which two IP addresses could be assigned to the hosts that are shown in the
exhibit? (Choose two.)
192.168.65.31
192.168.65.32
192.168.65.35
192.168.65.60
192.168.65.63
192.168.65.64
Q.18 What are the network and broadcast addresses for host 192.168.100.130/27? (Choose two.)
network 192.168.100.0
network 192.168.100.128
network 192.168.100.130
broadcast 192.168.100.157
broadcast 192.168.100.159
broadcast 192.168.100.255
Q.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
192.168.1.90/30
192.168.1.101/30
192.168.1.190/30

7. Q.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 outside network
the IP address of an outside host as it appears to the inside network
the IP address of an inside host as it appears to the inside network
the configured IP address assigned to a host in the outside network