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 so we can guess the interface connected to them has an IP address of 172. It is the interface we will apply our access-list (for outbound direction).22.30 is the number shown in the figure).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) . Corp1#configure terminal Our access-list needs to allow host C – host 172.23 via web (port 80) Corp1(config)#access-list 100 permit tcp host 192.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.168.22.33. Corp1#show running-config We learn that interface FastEthernet0/1 is the interface connected to Server LAN network. eq 80 Deny other hosts access to the Finance Web Server via web Corp1(config)#access-list 100 deny tcp any host 172. Use the “show running-config” command to check which interface has the IP address of 172.22. The Server LAN network has been assigned addresses of – 172.3 to the Finance Web Server 172.30 (.

click on the numbered boxes in the right panel. too. This does not require any configuration.22. To answer the multiple-choice questions. B or D) to access the Finance Web Server so please read the requirement carefully.242. Click on other hosts (A. If your configuration is correct then you can access it. In the address box type http://172. 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. you might be asked to allow other host (A.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. SMTP… then other hosts 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. Finally. In the real exam. just click on host C and open its web browser.23 to check if you are allowed to access Finance Web Server or not.) Notice: In the real exam. B and D) and check to make sure you can’t access Finance Web Server from these hosts. .

5a0c.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. Be sure to answer all five questions before leaving this item. Notice: All the images in this VTP LAB are used for demonstration only. 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 . It shows the learned MAC addresses and their associated interfaces. After entering this command. use the show mac-address-table command. you will see a MAC address table like this: From this table we can figure out that the MAC address 0010.There are five multiple-choice questions with this task.5a0c.

Neighbor Device ID : The name of the neighbor device. 4. Local Interface : The interface to which this neighbor is heard 3. 2. S for switch.Answer: Fa0/3. Port ID: The interface of the remote neighbor you receive CDP information 6. Platform: Which type of device the neighbor is 5. This command lists port. Holdtime: Decremental hold time in seconds Sample output of show cdp neighbors command: . Fa0/9 and Fa0/12 Explanation: Use the show interface trunk command to determine the trunking status of a link and VLAN status. H for Host etc. its mode. Capability: Capability of this neighboring device – R for router. encapsulation and whether it is trunking. so we can use the show cdp neighbors command to see: 1. 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.

we notice that the root port on Sw-Ac3 switch is FastEthernet0/12. 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″. In this case. 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. 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. so we have to figure out which switch is associated with this port -> it is the root bridge.

use the show vtp status command .Answer: 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/ with IP address 192.254 Question 6 From which switch did Sw-Ac3 receive VLAN information ? Answer: Sw-AC2 Explanation: to view the VTP configuration information.168.44.254/24 Therefore the default gateway of the host should be 192.44.

faculty.3 is: Question 7 Refer to the exibit. Management. Management.So we knew Sw-Ac3 received VLAN information from 163.8. It will be reconnected to the Fa 0/16 port of Sw-Ac3. 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 . admin.5. Finally we use the show cdp neighbors detail to find out who 163. SwX was taken out of the production network for maintenance. and no-where VLANs C – The VLANs Servers. Production and no-where will replace the VLANs on SwX D – The VLANs Servers.3 (notice:the IP address may be different). Production. Management.8. Servers.5. 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.

the answer should be “C – The VLANs Servers. Management. Also. Management. In general.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. Production and no-where will replace the VLANs on SwX”. if the revision number of SwX is lower than that of Sw-Ac3. . We should check vlan information of Sw-Ac3 switch with show vlan command So the correct answer is D – The VLANs Servers.In particular. 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. some recent comments have said that the new switch’s VTP Operating Mode is Server but the answer is still the same. which is greater than that of Sw-Ac3 switch. Therefore SwX will replace vlan information on other switches with its own information. 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).

8a47.Question 8 Out of which ports will a frame be forwarded that has source mac-address 0010.8a47. Therefore from the output above. 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 . we can figure out it will flood this frame to Fa0/1. it means that there can be other ports besides Fa0/1.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.e612 in this table. Fa0/3 and Fa0/12 belong to Vlan 33.fd86 is listed in the table and it belongs to Vlan 33 but we can’t find the destination mac-address 000a.5a0c.5a0c.fd86 and destination mac-address 000a. In this case. Please notice that the “show mac-address-table” command just lists information that was learned by the switch. except the port it received this frame (port Fa0/6). Fa0/3 and Fa0/12.

. 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. To verify our theory. In fact.2.And we found other ports which belong to vlan 33.0. we can easily guess that its default gateway should be a layer 3 device like a router. 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. they are Fa0/2. Fa0/5 and Fa0/7. Our switch will flood the frame to these ports.254. and in this case. the VLAN-R1 router.168.5 (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. So we have to find out who is the default gateway of this switch by using the show running-config command From the output. use the show cdp neighbor detail command and focus on the description of VLAN-R1 router From this output. too.1.254). we can confirm the switch’s default gateway is VLAN-R1 router (with the IP address of 192.168. we notice that its default-gateway is 192. it will forward the packet to its default gateway.

. Access to the router CLI can be gained by clicking on the appropriate host.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. All other inter connectivity and Internet access for the existing locations of the company are working properly. no routing updates are being exchanged between R3 and the new location.8360. 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. All passwords on all routers are cisco. The task is to identify the fault(s) and correct the router configuration to provide full connectivity between the routers. IP addresses are listed in the chart below.b7e9.

25 S0/0: 192.168.168. enter the show running-config command .113 S0/1: 192.60.129 Fa0/1: 192.168.6 Fa0/1: 192.65 Fa0/1: Fa1/0: Fa0/0: From the command line interface of R3 router.81 S0/1: 192.R1 R2 Fa0/0: 192.33 Fa0/0: 192.168.97 S1/0: R3 R4 Fa0/0: Answer and explanation We should check the configuration of the new added router first because it does not function properly while others work well.168.

60.0 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. When the AS numbers among routers are mismatched. (You should check the AS numbers on other routers for sure) To solve this problem. we know that this router was wrongly configured with an autonomous number (AS) of 22.0 R3(config-router)#network 192.77.0 R1(config-router)#end R1#copy running-config startup-config Now the whole network will work well.168.168. You should check again with ping command from router R3 to other routers! .168.From the output above. 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. 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. no adjacency is formed.77.