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By PassGuide CCNA Training Materials and Practice Tests | April 1, 2010

Cisco 640-802 passguide ccna Questions and Answers
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You have been hired by Specialty Hardware Incorporated to document the layout of the network. Complete the following tasks: Complete the network topology shown in the graphic by dragging the labels below with the appropriate router types, interface types, and IP addresses to the graphic . Find the information you need by using the router console attached to the R-CENTER router.

A.
This is the simplest lab question in four labs you see in the real CCNA exam. First we should identify the types of these routers by using the show cdp neighbors command:

There are 3 columns we should pay more attention to:
+ Local Interface: the interface on the device you are using “show cdp neighbors” command. In this case it is the interface of R-CENTER router
+ Platform: the platform of neighbor device
+ Port ID: the neighbor device’s port or interface on which the CDP packets are multicast
From the exhibit, the “Local Interface”, “Platform” and “Port ID” columns, we can identify where these four routers should be placed and their corresponding associated ports

Finally, use the show running-config command to find out the ip addresses of four interfaces on R-CENTER

And we can easily assign corresponding ip addresses to four neighbor routers, which are on the same network with R-CENTER router’s interfaces

Please remember in the real CCNA Exam the routers’ types, ip addresses and interfaces may be different! So make sure you understand how it works.

Answer: A

Question:267
Case Study # 1:
Scenario:
The diagram represents a small network with a single connection to the Internet. Using the information shown, answer the following questions.
Refer to the topology.

Case Study # 1 ( 5 Questions)

1. If the router R1 has a packet with a destination address 192.168.1.255, what describes the operation of the network?

A – R1 will forward the packet out all interfaces.
B – R1 will drop this packet because this it is not a valid IP address.
C – As R1 forwards the frame containing this packet, Sw-A will add 192.168.1.255 to its MAC table.
D – R1 will encapsulate the packet in a frame with a destination MAC address of FF-FF-FF-FF-FF-FF.
E – As R1 forwards the frame containing this packet, Sw-A will forward it to the device assigned the IP address of 192.168.1.255.

Answer: B

2. Users on the 192.168.1.0/24 network must access files located on the Server 1. What route could be configured on router R1 for file requests to reach the server?

A – Ip route 0.0.0.0 0.0.0.0 s0/0/0
B – Ip route 0.0.0.0 0.0.0.0 209.165.200.226
C – Ip route 209.165.200.0 255.255.255.0 192.168.1.250
D – Ip route 192.168.1.0 255.255.255.0 209.165.100.250

Answer: A

3. When a packet is sent from Host 1 to Server 1, in how many different frames will the packet be encapsulated as it is sent across the internetwork?

A – 0
B – 1
C – 2
D – 3
E – 4

Answer: D

4. What must be configured on the network in order for users on the Internet to view web pages located on Web Server 2?

A – On router R2, configure a default static route to the 192.168.1.0 network.
B – On router R2, configure DNS to resolve the URL assigned to Web Server 2 to the 192.168.1.10 address.
C – On router R1, configure NAT to translate an address on the 209.165.100.0/24 network to 192.168.1.10.
D – On router R1, configure DHCP to assign a registered IP address on the 209.165.100.0/24 network to Web Server 2.

Answer: C

5. The router address 192.168.1.250 is the default gateway for both the Web Server 2 and Host 1
What is the correct subnet mask for this network?

A – 255.255.255.0
B – 255.255.255.192
C – 255.255.255.250
D – 255.255.255.252

Answer: A

Question:268
Case Study # 2:
Refer to the topology.

Scenario:

Case Study # 2 ( 4Questions)
1. What destination Layer 2 address will be used in the frame header containing a packet for host 172.30.4.4?

A – 704
B – 196
C – 702
D – 344

Answer: C

2. A static map to the S-AMER location is required. Which command should be used to create this map?

A – frame-relay map ip 172.30.0.3 704 broadcast
B – frame-relay map ip 172.30.0.3 196 broadcast
C – frame-relay map ip 172.30.0.3 702 broadcast
D – frame-relay map ip 172.30.0.3 344 broadcast

Answer: B

3. Which connection uses the default encapsulation for serial interfaces on Cisco routers?

A – The serial connection to the MidEast branch office.
B – The serial connection to the DeepSouth branch office.
C – The serial connection to the NorthCentral branch office.
D – The serial connection to the Multinational branch office.

Answer: A

4. If required, what password should be configured on the router in the MidEast branch office to allow a connection to be established with the Dubai router?

A – No password is required
B – Enable
C – Scr
D – Telnet
E – Console

Answer: D

Question:269
Case Study# 3
Refer to the topology:

Case Study# 3 ( 4 Questions)

1. Refer to the exhibit.
Using the information shown, answer the question. All hosts in the networks have been operational for several hours when the DHCP server goes down. What happens to the hosts that have obtained service from the DHCP server?

A – The hosts will not be able to communicate with any other hosts.
B – The hosts will continue to communicate normally for a period of timE:
C – The hosts will be able to communicate with hosts outsides their own network
D – The hosts wll only be able to communicate with other hosts by IP address not by hostname

Answer: B

2. Refer to the exhibit.
Using the information shown. What is the purpose of the DHCP server?

A – To provide storage for email
B – To translate URLs to IP addresses
C – To translate IPv4 addresses to MAC addresses
D – To provide an IP configuration information to hosts

Answer: D

3. Refer to the exhibit.
Using the information shown How is the message sent from a PC2 when is first powers on and attempts to contact the DHCP Server?

A – Layer 3 unicast
B – Layer 3 broadcast
C – Layer 3 multicast
D – Without any Layer 3 encapsulation

Answer: B

4. Refer to the exhibit.
Using the information shown What is the default behavior of 1 when PC1 requests service from DHCP server?

A – Drop the request.
B – Broadcast the request to 2 and 3
C – Forward the request to 2
D – Broadcast the request to 2, 3 and ISP

Answer: A

Question:270
This task requires you to use the CLI of Sw-AC3 to answer five multiple-choice questions. This does not require any configuration.
To answer the multiple-choice questions, click on the numbered boxes in the right panel.
There are five multiple-choice questions with this task. Be sure to answer all five questions before leaving this item.

1. What interface did Sw-AC3 associate with source MAC address 0010.5a0c.ffba ?

a) Fa0/1
b) Fa0/3
c) Fa0/6
d) Fa0/8
e) Fa0/9
f) Fa0/12

Answer: d)

2. What ports on Sw-AC3 are operating has trunks (choose three)?
a) Fa0/1
b) Fa0/3
c) Fa0/4
d) Fa0/6
e) Fa0/9
f) Fa0/12

Answer: b), e) and f)

3. What kind of router is VLAN-R1?
a) 1720
b) 1841
c) 2611
d) 2620

Answer: d)

4. Which switch is the root bridge for VLAN 1?

Answer: Sw-DS1

5. What address should be configured as the default-gateway for the host connected to interface fa 0/4 of SW-Ac3?

Answer: 192.168.44.254

6. From which switch did Sw-Ac3 receive VLAN information ?

Answer: Sw-AC2

7. Refer to the exibit, SwX was taken out of the production network for maintenance. It will be reconnected to the Fa 0/16 port of Sw-Ac3. What happens to the network when it is reconnected and a trunk exists between the two switches?

A – All VLANs except the default VLAN win be removed from all switches
B – All existing switches will have the students, admin, faculty, Servers, Management, Production, and no-where VLANs
C – The VLANs Servers, Management, Production and no-where will replace the VLANs on SwX
D – The VLANs Servers, Management, Production and no-where will be removed from existing switches

Answer and Explanation:

First we should view the VTP configuration of switch Sw-Ac3 by using the show vtp status command on Sw-Ac3

Notice that its configuration revision number is 5 and VTP Domain Name is home-office
Next, from the exhibit we know that SwX has a revision number of 6, which is greater than that of Sw-Ac3 switch, and both of them have same VTP Domain Name called “home-office”.

Therefore SwX will replace vlan information on other switches with its own information. We should check vlan information of Sw-Ac3 switch with show vlan command

So the correct answer is D – The VLANs Servers, Management, Production and no-where will be removed from existing switches
Please notice that in the real CCNA exam you may see a different configuration revision of Sw-Ac3 or of SwX. In general, which switch has a higher revision number it will become the updater and other switches will overwrite their current databases with the new information received from the updater (provided that they are on the same domain and that switch is not in transparent mode).

8. Out of which ports will a frame be forwarded that has source mac-address 0010.5a0c.fd86 and destination mac-address 000a.8a47.e612? (Choose three)

A – Fa0/8
B – Fa0/3
C – Fa0/1
D – Fa0/12

Answer: B C D

9. If one of the host connected to Sw-AC3 wants to send something for the ip 190.0.2.5 (or any ip that is not on the same subnet) what will be the destination MAC address

Answer and Explanation:

Because the destination address is not on the same subnet with the switch, it will forward the packet to its default gateway. So we have to find out who is the default gateway of this switch by using the show running-config command

From the output, we notice that its default-gateway is 192.168.1.254. In fact, we can easily guess that its default gateway should be a layer 3 device like a router; and in this case, the VLAN-R1 router. To verify our theory, use the show cdp neighbor detail command and focus on the description of VLAN-R1 router

From this output, we can confirm the switch’s default gateway is VLAN-R1 router (with the IP address of 192.168.1.254). And “the interface: FastEthernet0/3″ tells us that the switch is connected to VLAN-R1 router through Fa0/3 port (Fa0/3 is the port on the switch).
Finally we just need to use the show mac-address-table command to find out which MAC address is associated with this interface

(Notice that in the real CCNA exam the MAC address or port may be different)
And we find out the corresponding MAC address is 000a.b7e9.8360. Although there are some entries of port Fa0/3 with different Vlans but they have the same MAC address

Question:271
This topology contains 3 routers and 1 switch. Complete the topology.
Drag the appropriate device icons to the labeled Device
Drag the appropriate connections to the locations labeled Connections.
Drag the appropriate IP addresses to the locations labeled IP address
(Hint: use the given host addresses and Main router information)
To remove a device or connection, drag it away from the topology.
Use information gathered from the Main router to complete the configuration of any additional routers. No passwords are required to access the Main router. The config terminal command has been disabled for the HQ router. The router does not require any configuration.

Configure each additional router with the following:
Configure the interfaces with the correct IP address and enable the interfaces.
Set the password to allow console access to consolepw
Set the password to allow telnet access to telnetpw
Set the password to allow privilege mode access to privpw
Note: Because routes are not being added to the configurations, you will not be able to ping through the internetwork.

All devices have cable autosensing capabilities disabled.
All hosts are PC’s

A.
Specify appropriate devices and drag them on the “Device” boxes
For the device at the bottom-right box, we notice that it has 2 interfaces Fa0/2 and Fa0/4; moreover the link connects the PC on the right with the device on the bottom-right is a straight-through link -> it is a switch
The question stated that this topology contains 3 routers and 1 switch -> two other devices are routers
Place them on appropriate locations as following:

(Host D and host E will be automatically added after placing two routers. Click on them to access neighboring routers)

Specify appropriate connections between these devices:
+ The router on the left is connected with the Main router through FastEthernet interfaces: use a crossover cable
+ The router on the right is connected with the Main router through Serial interfaces: use a serial cable
+ The router on the right and the Switch: use a straight-through cable
+ The router on the left and the computer: use a crossover cable
(To remember which type of cable you should use, follow these tips:
- To connect two serial interfaces of 2 routers we use serial cable
- To specify when we use crossover cable or straight-through cable, we should remember:

Group 1: Router, Host, Server
Group 2: Hub, Switch
One device in group 1 + One device in group 2: use straight-through cable
Two devices in the same group: use crossover cable
For example: we use straight-through cable to connect switch to router, switch to host, hub to host, hub to server… and we use crossover cable to connect switch to switch, switch to hub, router to router, host to host… )

Assign appropriate IP addresses for interfaces:
From Main router, use show running-config command:

(Notice that you may see different IP addresses in the real CCNA exam, the ones shown above are just used for demonstration)
From the output we learned that the ip address of Fa0/0 interface of the Main router is
192.168.152.177/28. This address belongs to a subnetwork which has:
Increment: 16 (/28 = 255.255.255.240 or 1111 1111.1111 1111.1111 1111.1111 0000)
Network address: 192.168.152.176 (because 176 = 16 * 11 and 176 < 177)
Broadcast address: 192.168.152.191 (because 191 = 176 + 16 - 1)

And we can pick up an ip address from the list that belongs to this subnetwork: 192.168.152.190 and assign it to the Fa0/0 interface the router on the left
Use the same method for interface Serial0/0 with an ip address of 192.168.152.161
Increment: 16
Network address: 192.168.152.160 (because 160 = 16 * 10 and 160 < 161)
Broadcast address: 192.168.152.175 (because 176 = 160 + 16 - 1)

-> and we choose 192.168.152.174 for Serial0/0 interface of the router on the right

Interface Fa0/1 of the router on the left

IP (of the computer on the left) : 192.168.152.129/28
Increment: 16
Network address: 192.168.152.128 (because 128 = 16 * 8 and 128 < 129)
Broadcast address: 192.168.152.143 (because 143 = 128 + 16 - 1)
-> we choose 192.168.152.142 from the list

Interface Fa0/0 of the router on the right
IP (of the computer on the left) : 192.168.152.225/28
Increment: 16
Network address: 192.168.152.224 (because 224 = 16 * 14 and 224 < 225)
Broadcast address: 192.168.152.239 (because 239 = 224 + 16 - 1)
-> we choose 192.168.152.238 from the list
Let’s have a look at the picture below to summarize

Configure two routers on the left and right with these commands:
Router1 = router on the left
Assign appropriate IP addresses to Fa0/0 & Fa0/1 interfaces:
Router1>enable
Router1#configure terminal
Router1(config)#interface fa0/0
Router1(config-if)#ip address 192.168.152.190 255.255.255.240
Router1(config-if)#no shutdown
Router1(config-if)#interface fa0/1
Router1(config-if)#ip address 192.168.152.142 255.255.255.240
Router1(config-if)#no shutdown
Set passwords (configure on two routers)
+ Console password:
Router1(config-if)#exit
Router1(config)#line console 0
Router1(config-line)#password consolepw
Router1(config-line)#login
Router1(config-line)#exit
+ Telnet password:
Router1(config)#line vty 0 4
Router1(config-line)#password telnetpw
Router1(config-line)#login
Router1(config-line)#exit
+ Privilege mode password:
Router1(config)#enable password privpw
Save the configuration:
Router1(config)#exit
Router1#copy running-config startup-config
Configure IP addresses of Router2 (router on the right)
Router2>enable
Router2#configure terminal
Router2(config)#interface fa0/0
Router2(config-if)#ip address 192.168.152.238 255.255.255.240
Router2(config-if)#no shutdown

Router2(config-if)#interface serial0/0
Router2(config-if)#ip address 192.168.152.174 255.255.255.240
Router2(config-if)#no shutdown
and set console, telnet and privilege mode passwords for Router2 as we did for Router1, remember to save the configuration when you finished

Answer: A