Juniper MX Series

Chapter Review Questions

1. How many VLAN tags are in an IEEE 802.1Q frame?

   1. 1

   2. 2

   3. 3

   4. All of the above

2. Which type of IFL VLAN tagging is required to support IEEE 802.1QinQ?

   1. vlan-tagging

   2. stacked-vlan-tagging

   3. flexible-vlan-tagging

   4. vlan-tags

3. When would you want to use encapsulation flexible-ethernet-services?

   1. Creating access ports

   2. To automatically set the encapsulation for each IFL to vlan-bridge

   3. To independently set the encapsulation for each IFL

   4. To support multiple customers from the same IFD

4. Does the Enterprise-style interface configuration support VLAN mapping?

   1. Yes

   2. No

5. If there was an ingress frame (C-TAG = 100) and you needed to perform VLAN mapping so that the egress frame was (S-TAG = 5, C-TAG = 444), which stack operation would you need for input-vlan-map?

   1. Swap-swap

   2. Pop-swap

   3. Swap-push

   4. Push-push

6. How many learning domains are in a bridge domain configured with vlan-id none?

   1. 0

   2. 1

   3. 4,000

   4. 4,094

7. How many learning domains are in a bridge domain configured with vlan-id all?

   1. 0

   2. 1

   3. 4,000

   4. 4,094

8. What does MAC accounting do?

   1. Counts the number of MAC addresses globally

   2. Counts the number of dropped ARP requests

   3. Keeps track of MAC address movement between IFLs in a bridge domain

   4. Keeps track of how many times a particular MAC address has been used for source or destination bridging

9. What’s the default speed of the interface irb?

   1. 100 Mbps

   2. 1,000 Mbps

   3. Determined by the number of ports in the bridge domain

   4. Set to the highest port speed in the bridge domain

10. Can a bridge domain with the same vlan-id be configured across multiple virtual switches?

    1. Yes