You are on page 1of 14


CCNA Access List Sim 2
Question A network associate is adding security to the configuration of the Corp1 router. The user on host C should be able to use a web browser to access financial information from the Finance Web Server. No other hosts from the LAN nor the Core should be able to use a web browser to access this server. Since there are multiple resources for the corporation at this location including other resources on the Finance Web Server, all other traffic should be allowed. The task is to create and apply an access-list with no more than three statements that will allow ONLY host C web access to the Finance Web Server. No other hosts will have web access to the Finance Web Server. All other traffic is permitted. Access to the router CLI can be gained by clicking on the appropriate host. All passwords have been temporarily set to “cisco”. The Core connection uses an IP address of The computers in the Hosts LAN have been assigned addresses of – Host A Host B Host C Host D The servers in the Server LAN have been assigned addresses of – The Finance Web Server is assigned an IP address of

17 – 172.30 (.33.3 host 172.30 so we can guess the interface connected to them has an IP address of 172.23 eq 80 All other traffic is permitted Corp1(config)#access-list 100 permit ip any any Apply this access-list to Fa0/1 interface (outbound direction) .168.23 eq 80 Deny other hosts access to the Finance Web Server via web Corp1(config)#access-list 100 deny tcp any host 172. Corp1#show running-config We learn that interface FastEthernet0/1 is the interface connected to Server LAN network.Answer and Explanation Corp1>enable (you may enter “cisco” as it passwords here) We should create an access-list and apply it to the interface which is connected to the Server LAN because it can filter out traffic from both Sw-2 and Core networks.23 via web (port 80) Corp1(config)#access-list 100 permit tcp host 192. The Server LAN network has been assigned addresses of 172.30 is the number shown in the figure).242. Use the “show running-config” command to check which interface has the IP address of Corp1#configure terminal Our access-list needs to allow host C – to the Finance Web Server 172.242. It is the interface we will apply our access-list (for outbound direction).

) Notice: In the real exam. click on the numbered boxes in the right panel. To answer the multiple-choice questions. too. just click on host C and open its web browser.23 to check if you are allowed to access Finance Web Server or not. If your configuration is correct then you can access it. CCNA VTP SIM Question Question This task requires you to use the CLI of Sw-AC3 to answer five multiple-choice questions. In the real exam. In the address box type http://172. Click on other hosts (A. B and D) and check to make sure you can’t access Finance Web Server from these hosts. SMTP… then other hosts can access it.22. save the configuration Corp1(config-if)#end Corp1#copy running-config startup-config (This configuration only prevents hosts from accessing Finance Web Server via web but if this server supports other traffic – like FTP. This does not require any configuration. B or D) to access the Finance Web Server so please read the requirement carefully. you might be asked to allow other host (A. . Finally.Corp1(config)#interface fa0/1 Corp1(config-if)#ip access-group 100 out Notice: We have to apply the access-list to Fa0/1 interface (not Fa0/0 interface) so that the access-list can filter traffic coming from the Core network.242.

you will see a MAC address table like this: From this table we can figure out that the MAC address 0010.5a0c.5a0c. use the show mac-address-table command. After entering this command. you will see slightly different images in the real CCNA exam Question 1 What interface did Sw-AC3 associate with source MAC address 0010.ffba is associated with interface Fa0/8 Question 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 .There are five multiple-choice questions with this task. It shows the learned MAC addresses and their associated interfaces.ffba ? a) Fa0/1 b) Fa0/3 c) Fa0/6 d) Fa0/8 e) Fa0/9 f) Fa0/12 Answer: Fa 0/8 Explanation: to find out which interface associated with a given MAC address. Notice: All the images in this VTP LAB are used for demonstration only. Be sure to answer all five questions before leaving this item.

S for switch.Answer: Fa0/3. 4. The image below shows how it works: (This image is used for demonstration only) Question 3 What kind of router is VLAN-R1? a) 1720 b) 1841 c) 2611 d) 2620 Answer: 2620 Explanation: VLAN-R1 is the router directly connected to Sw-Ac3 switch. Capability: Capability of this neighboring device – R for router. Holdtime: Decremental hold time in seconds Sample output of show cdp neighbors command: . 2. This command lists port. encapsulation and whether it is trunking. so we can use the show cdp neighbors command to see: 1. Platform: Which type of device the neighbor is 5. Port ID: The interface of the remote neighbor you receive CDP information 6. Fa0/9 and Fa0/12 Explanation: Use the show interface trunk command to determine the trunking status of a link and VLAN status. its mode. H for Host etc. Neighbor Device ID : The name of the neighbor device. Local Interface : The interface to which this neighbor is heard 3.

If you see there is at least one Root port in the interface roles then you can confirm Sw-Ac3 is not the root bridge because root bridge does not have root port. Sw-DS1 is associated with interface FastEthernet0/12 -> Sw-DS1 is the root bridge Question 5 What address should be configured as the default-gateway for the host connected to interface fa 0/4 of SW-Ac3? .One thing I want to notice you is “Local Intrfce” in the image above refers to the local interface on the device you are running the “show cdp neighbors” command Question 4 Which switch is the root bridge for VLAN 1? Answer: Sw-DS1 Explanation: First we use the show spanning-tree vlan 1 to view the spanning-tree information of VLAN 1 From the “Cost 19″. we notice that the root port on Sw-Ac3 switch is FastEthernet0/12. In this case. so we have to figure out which switch is associated with this port -> it is the root bridge. In this case. we learn that the root switch is directly connected to the Sw-Ac3 switch over a 100Mbps Ethernet link Notice that if you see all of the interface roles are Desg (designated) then you can confirm SwAc3 switch is the root bridge for this VLAN (VLAN 1). You can verify it with the show cdp neighbors command: The “Local Intrfce” column refers to the interface on the switch running “show cdp neighbors” command.

Answer: use the show vtp status command .254/24 Therefore the default gateway of the host should be 192.254 Explanation: First we have to identify which VLAN interface Fa0/4 belongs to by the show vlan command From the exhibit we know that VLAN 44 is configured on router using sub-interface Fa0/0.168.254 Question 6 From which switch did Sw-Ac3 receive VLAN information ? Answer: Sw-AC2 Explanation: to view the VTP configuration information.44.168.44 with IP address 192.

8. and no-where VLANs C – The VLANs Servers. SwX was taken out of the production network for maintenance.3 (notice:the IP address may be different).So we knew Sw-Ac3 received VLAN information from 163. Production and no-where will replace the VLANs on SwX D – The VLANs Servers. Management.8. Management. It will be reconnected to the Fa 0/16 port of Sw-Ac3. admin. faculty. Finally we use the show cdp neighbors detail to find out who 163. Servers. Management.5.3 is: Question 7 Refer to the exibit. 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 .5. Production. 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.

Therefore SwX will replace vlan information on other switches with its own information. the answer should be “C – The VLANs Servers. from the exhibit we know that SwX has a revision number of 6. Management.In particular.Notice that its configuration revision number is 5 and VTP Domain Name is home-office Next. Production and no-where will replace the VLANs on SwX”. which is greater than that of Sw-Ac3 switch. some recent comments have said that the new switch’s VTP Operating Mode is Server but the answer is still the same. if the revision number of SwX is lower than that of Sw-Ac3. 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 SwAc3 or of SwX. . Management. and both of them have same VTP Domain Name called “home-office”. 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). In general. Also. We should check vlan information of Sw-Ac3 switch with show vlan command So the correct answer is D – The VLANs Servers.

5a0c.8a47.e612? (Choose three) A – Fa0/8 B – Fa0/3 C – Fa0/1 D – Fa0/12 Answer: B C D Explanation: First we check to see which ports the source mac-address and the destination mac-address belong to by using show mac-address-table command We notice that the source mac-address 0010. it means that there can be other ports besides Fa0/1.5a0c. we can figure out it will flood this frame to Fa0/1. except the port it received this frame (port Fa0/6). In this case. the switch will flood to all ports of Vlan 33 and flood to all the trunk links. You can use the show vlan command to see which ports belong to vlan 33 . Please notice that the “show mac-address-table” command just lists information that was learned by the switch.8a47. Therefore from the output above.fd86 is listed in the table and it belongs to Vlan 33 but we can’t find the destination mac-address 000a.Question 8 Out of which ports will a frame be forwarded that has source mac-address 0010.fd86 and destination mac-address 000a. Fa0/3 and Fa0/12.e612 in this table. Fa0/3 and Fa0/12 belong to Vlan 33.

1. In fact. So we have to find out who is the default gateway of this switch by using the show running-config command From the output.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. we notice that its default-gateway is 192.254). To verify our theory. Our switch will flood the frame to these ports. And we can check which trunk ports will receive this frame by the show interface trunk command -> Port Fa0/9 will also receive this frame! Question 9 If one of the host connected to Sw-AC3 wants to send something for the ip 190.168. too. . we can easily guess that its default gateway should be a layer 3 device like a router. and in this case.168.2. Fa0/5 and Fa0/7. it will forward the packet to its default gateway. the VLAN-R1 router. we can confirm the switch’s default gateway is VLAN-R1 router (with the IP address of 192.0. 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).1.And we found other ports which belong to vlan 33. they are Fa0/2. use the show cdp neighbor detail command and focus on the description of VLAN-R1 router From this output.254.

. All passwords on all routers are cisco.8360. The task is to identify the fault(s) and correct the router configuration to provide full connectivity between the routers. no routing updates are being exchanged between R3 and the new location. Access to the router CLI can be gained by clicking on the appropriate host. All other inter connectivity and Internet access for the existing locations of the company are working properly. IP addresses are listed in the chart below.b7e9.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. Although there are some entries of port Fa0/3 with different Vlans but they have the same MAC address CCNA EIGRP LAB Question Question After adding R3 router.

25 S0/0: R2 Fa0/0: S0/1: 192.65 Fa0/1: 192.168. enter the show running-config command .26 Answer and explanation We should check the configuration of the new added router first because it does not function properly while others work well.113 S0/1: 192.168.97 S1/0: 198.129 Fa0/1: 192. From the command line interface of R3 router.18.168.14 R3 R4 Fa0/0: Fa0/0: 192.168.33 Fa0/0: 192.6 Fa0/1: 192.60.145 Fa1/0:

0 R3(config-router)#no auto-summary R3(config-router)#end R3#copy running-config startup-config Check R1 router with the show running-config command: Notice that it is missing a definition to the network R3.77. (You should check the AS numbers on other routers for sure) To solve this problem.60. Therefore we have to add it so that it can recognize R3 router R1>enable (you have to enter cisco as its password here) R1#configure terminal R1(config)#router eigrp 212 R1(config-router)#network 192.0 R3(config-router)#network 192. When the AS numbers among routers are mismatched. You should check again with ping command from router R3 to other routers! .168.168. we simply re-configure router R3 with the following commands: R3>enable (you have to enter cisco as its password here) R3#configure terminal R3(config)#no router eigrp 22 R3(config)#router eigrp 212 R3(config-router)#network 192.From the output above.77.168. no adjacency is formed. we know that this router was wrongly configured with an autonomous number (AS) of 22.0 R1(config-router)#end R1#copy running-config startup-config Now the whole network will work well.