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CCNP – BCMSN 642-812 Curriculum Labs

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Module 1: Network Requirements

There are no labs for this module.

Module 2: Defining VLANs

Lab 2-0 Clearing a Switch
Lab 2-1 Catalyst 2960 and 3560 Series Static VLANS, VLAN Trunking, and VTP Domain and Modes

Module 3: Implementing Spanning Tree

3.5.1 Lab 3-1 Spanning Tree Protocol (STP) Default Behavior
3.5.2 Lab 3-2 Modifying Default Spanning Tree Behavior
3.5.3 Lab 3-3 Per-VLAN Spanning Tree Behavior
3.5.4 Lab 3-4 Multiple Spanning Tree
3.5.5 Lab 3-5 Configuring Etherchannel

Module 4: Implementing Inter-VLAN Routing

4.4.1 Lab 4-1 Inter-VLAN Routing with an External Router
4.4.2 Lab 4-2 Inter-VLAN Routing with an Internal Route Processor and Monitoring CEF Functions

Module 5: Implementing High Availability in a Campus Environment

5.4.1 Lab 5-1 Hot Standby Router Protocol

Module 6: Wireless LANs

6.7.1 Lab 6-1 Configuring a WLAN Controller
6.7.1 Lab 6-1 Configuring a WLAN Controller (Optional)
6.7.2 Lab 6-2 Configuring a WLAN Controller via the Web Interface
6.7.2 Lab 6-2 Configuring a WLAN Controller via the Web Interface (Optional)
6.7.3 Lab 6-3 Configuring a Wireless Client

Module 7: Configuring Campus Switches to Support Voice

7.3.1 Lab 7-1 Configuring Switches for IP Telephony Support

Module 8: Minimizing Service Loss and Data Theft in a Campus Network

8.7.1 Lab 8-1 Securing the Layer 2 Switching Devices 
8.7.2 Lab 8-2 Securing Spanning Tree Protocol 
8.7.3 Lab 8-3 Securing VLANs with Private VLANs, RACLs, and VACLs

Case Studies 

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QUESTION 39:
You need to configure a new Certkiller switch for trunking. Which switch command
enables a trunking protocol that appends a four byte CRC to the packet?
A. Certkiller Switch(config-if)#switchport trunk encapsulation dot1q
B. Certkiller Switch(config-if)#switchport trunk encapsulation itef
C. Certkiller Switch(config-if)#switchport trunk encapsulation fddi
D. Certkiller Switch(config-if)#switchport trunk encapsulation isl
E. None of the above
Answer: D
Explanation:
The Inter-Switch Link (ISL) protocol is a Cisco proprietary method for preserving the
source VLAN identification of frames passing over a trunk link. ISL performs frame
identification in Layer 2 by encapsulating each frame between a header and trailer. Any
Cisco switch or router device configured for ISL can process and understand the ISL
VLAN information. ISL is primarily used for Ethernet media, although Cisco has
included provisions to carry Token Ring, FDDI, and ATM frames over Ethernet ISL. (A
Frame-Type field in the ISL header indicates the source frame type.)
When a frame is destined out a trunk link to another switch or router, ISL adds a 26-byte
header and a 4-byte trailer to the frame. The source VLAN is identified with a 10-bit
VLAN ID field in the header. The trailer contains a cyclic redundancy check (CRC)
value to ensure the data integrity of the new encapsulated frame. Figure 6-3 shows how
Ethernet frames are encapsulated and forwarded out a trunk link. Because tagging
information is added at the beginning and end of each frame, ISL is sometimes referred
to as double tagging.
QUESTION 40:

While using a packet analyzer, you notice four additional bytes being added to the
packets in the Certkiller network. Which protocol inserts a four byte tag into the
Ethernet frame and recalculates CRC value?
A. DTP
B. VTP
C. 802.1Q
D. ISL
E. None of the above
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