Hotspot 2: Topology Question
640-802 CCNA Hotspot Topology Exhibit
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Note: host 172.30.4.4 is wrongly given in Question the correct host must be 172.30.0.4
The destination layer 2 address is a DLCI for frame-relay network. The destination host packet address is 172.30.0.4 corresponding DLCI is 702.
This can be confirmed by looking at the show frame-relay map output which shows the frame-relay map statements for layer 3 address to its corresponding layer 2 address IP 172.30.0.4 is mapped to DLCI 702 .
Answers: frame-relay map ip 172.30.0.3 196 broadcast
The show frame-relay map command above output provides the dynamic mapping for S-AMER (.3 as per topology the complete address is 172.30.0.3) to DLCI 196.
To create a static frame-relay map on dubai router to S-AMER we use the following command
Syntax: frame-relay map protocol protocol-address dlci [broadcast]
frame-relay map ip 172.30.0.3 196 broadcast
Answers: The serial connection to the MidEast branch office
By seeing the partial running config provided for Dubai router ... We can identify what encapuslation type is configured on each interface
Interface serial 1/0 : encapsulation frame-relay
Interface serial 1/2 and serial 1/3 : Both have encapsulation ppp
Interaface serial 1/1: Has no config info on encapsulation type this determines the default encapsulation (HDLC) is not changed on this interface.
Serial 1/1 is connection to MidEast branch office from Dubai router which has the default encapsulation.
Answers: No pass is required
(source : 9tut.com)
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.
Notice: All the images in this VTP LAB are used for demonstration only, you will see slightly different images in the real CCNA exam
What interface did Sw-AC3 associate with source MAC address 0010.5a0c.ffba ?
Answer: Fa 0/8
Explanation: to find out which interface associated with a given MAC address, use the show mac-address-table command. It shows the learned MAC addresses and their associated interfaces. After entering this command, you will see a MAC address table like this:
From this table we can figure out that the MAC address 0010.5a0c.ffba is associated with interface Fa0/8
What ports on Sw-AC3 are operating has trunks (choose two)?
Answer: Fa0/9 and Fa0/12
Explanation: Use the show interface trunk command to determine the trunking status of a link and VLAN status. This command lists port, its mode, encapsulation and whether it is trunking. The image below shows how it works:
(This image is used for demonstration only)
What kind of router is VLAN-R1?
Explanation: VLAN-R1 is the router directly connected to Sw-Ac3 switch, so we can use the show cdp neighbors command to see:
1. Neighbor Device ID : The name of the neighbor device;
2. Local Interface : The interface to which this neighbor is heard
3. Capability: Capability of this neighboring device - R for router, S for switch, H for Host etc.
4. Platform: Which type of device the neighbor is
5. Port ID: The interface of the remote neighbor you receive CDP information
6. Holdtime: Decremental hold time in seconds
Sample output of show cdp neighbors command:
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?
Explanation: First we use the show spanning-tree vlan 1 to view the spanning-tree information of VLAN 1
Notice that if you see all of the interface roles are Desg (designated) then you can confirm Sw-Ac3 switch is the root bridge for this VLAN (VLAN 1).
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 notice that the root port on Sw-Ac3 switch is FastEthernet0/12, so we have to figure out which switch is associated with this port -> it is the root bridge. 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. In this case, 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?
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 Fa0/0.44 with IP address 192.168.44.254/24
Therefore the default gateway of the host should be 192.168.44.254