Interconnecting Cisco Networking Devices Part 2 : 640-816 Exam

Exam Number/Code: 640-816
Exam Name: Interconnecting Cisco Networking Devices Part 2

“Interconnecting Cisco Networking Devices Part 2″, also known as 640-816 exam, is a Cisco certification.
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640-816 ICND2
Interconnecting Cisco Networking Devices Part 2
Exam Number: 640-816 ICND2
Associated Certifications: CCNA
Duration: 75 minutes (45-55 questions)
Available Languages: English
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Exam Description Exam Topics Recommended Training Additional Resources
Exam Description

The 640-816 Interconnecting Cisco Networking Devices Part 2 (ICND2) is the exam associated with the Cisco Certified Network Associate certification. Candidates can prepare for this exam by taking the Interconnecting Cisco Networking Devices Part 2 (ICND2) v1.0 course. This exam tests a candidate’s knowledge and skills required to successfully install, operate, and troubleshoot a small to medium size enterprise branch network. The exam covers topics on VLSM and IPv6 addressing; extending switched networks with VLANs; configuring, verifying and troubleshooting VLANs; the VTP, RSTP, OSPF and EIGRP protocols; determining IP routes; managing IP traffic with access lists; NAT and DHCP; establishing point-to- point connections; and establishing Frame Relay connections.
Exam Topics

The following topics are general guidelines for the content likely to be included on the Interconnecting Cisco Networking Devices Part 2 exam. However, other related topics may also appear on any specific delivery of the exam. In order to better reflect the contents of the exam and for clarity purposes, the guidelines below may change at any time without notice.
Configure, verify and troubleshoot a switch with VLANs and interswitch communications

* Describe enhanced switching technologies (including: VTP, RSTP, VLAN, PVSTP, 802.1q)
* Describe how VLANs create logically separate networks and the need for routing between them
* Configure, verify, and troubleshoot VLANs
* Configure, verify, and troubleshoot trunking on Cisco switches
* Configure, verify, and troubleshoot interVLAN routing
* Configure, verify, and troubleshoot VTP
* Configure, verify, and troubleshoot RSTP operation
* Interpret the output of various show and debug commands to verify the operational status of a Cisco switched network
* Implement basic switch security (including: port security, unassigned ports, trunk access, etc.)

Implement an IP addressing scheme and IP Services to meet network requirements in a medium-size Enterprise branch office network

* Calculate and apply a VLSM IP addressing design to a network
* Determine the appropriate classless addressing scheme using VLSM and summarization to satisfy addressing requirements in a LAN/WAN environment
* Describe the technological requirements for running IPv6 (including: protocols, dual stack, tunneling, etc)
* Describe IPv6 addresses
* Identify and correct common problems associated with IP addressing and host configurations

Configure and troubleshoot basic operation and routing on Cisco devices

* Compare and contrast methods of routing and routing protocols
* Configure, verify and troubleshoot OSPF
* Configure, verify and troubleshoot EIGRP
* Verify configuration and connectivity using ping, traceroute, and telnet or SSH
* Troubleshoot routing implementation issues
* Verify router hardware and software operation using SHOW & DEBUG commands
* Implement basic router security

Implement, verify, and troubleshoot NAT and ACLs in a medium-size Enterprise branch office network.

* Describe the purpose and types of access control lists
* Configure and apply access control lists based on network filtering requirements
* Configure and apply an access control list to limit telnet and SSH access to the router
* Verify and monitor ACL’s in a network environment
* Troubleshoot ACL implementation issues
* Explain the basic operation of NAT
* Configure Network Address Translation for given network requirements using CLI
* Troubleshoot NAT implementation issues

Implement and verify WAN links

* Configure and verify Frame Relay on Cisco routers
* Troubleshoot WAN implementation issues
* Describe VPN technology (including: importance, benefits, role, impact, components)
* Configure and vary PPP connection between Cisco routers

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QUESTION 27:
Two Certkiller switches are shown below:
This network is stable and operating properly. Assuming that default STP
configurations are running on both switches, which port will be in blocking mode?
A. Port Fa0/1 on Certkiller 1
B. Port Fa0/2 on Certkiller 1
C. Port Fa0/1 on Certkiller 2
D. Port Fa0/2 on Certkiller 2
Answer: A
Explanation:
Spanning-Tree Protocol (STP) is a Layer 2 protocol that utilizes a special-purpose
algorithm to discover physical loops in a network and effect a logical loop-free topology.
STP creates a loop-free tree structure consisting of leaves and branches that span the
entire Layer 2 network. The actual mechanics of how bridges communicate and how the
STP algorithm works will be discussed at length in the following topics. Note that the
terms bridge and switch are used interchangeably when discussing STP. In addition,
unless otherwise indicated, connections between switches are assumed to be trunks.
The switches move on to selecting Root Ports. The Root Port of a bridge is the port that
is closest to the Root Bridge in terms of Path Cost. Every non-Root Bridge must select
one Root Port. Again, bridges use the concept of cost to measure closeness. As with some
routing metrics, the measure of closeness using STP is not necessarily reflected by hop
count. Specifically, bridges track what is referred to as Root Path Cost, which is the
cumulative cost of all links to the Root Bridge. So, Answer A is correct.
QUESTION 28:
Exhibit:
Exhibit:
Please study the exhibit carefully. How can a network administrator ensure that the
STP election process would result in Certkiller B being elected as the root switch?
A. Clear the Certkiller B STP revision number.
B. Assign Certkiller B a low priority number.
C. Increase the Certkiller B priority number.
D. Change the MAC address of Certkiller B
Answer: B
Explanation:
An election process among all connected switches chooses the Root Bridge. Each switch has a unique
Bridge ID that identifies it to other switches. The Bridge ID is an 8-byte value consisting of the following
fields:
Bridge Priority 2 bytes-The priority or weight of a switch in relation to all other switches.
The priority field can have a value of 0 to 65,535 and defaults to 32,768 (or 0×8000) on
every Catalyst switch.
MAC Address 6 bytes-The MAC address used by a switch can come from the Supervisor
module, the backplane, or a pool of 1024 addresses that are assigned to every Supervisor
or backplane depending on the switch model. In any event, this address is hardcoded and
unique, and the user cannot change it.
When a switch first powers up, it has a narrow view of its surroundings and assumes that it is the Root
Bridge itself. This notion will probably change as other switches check in and enter the election process.
The election process then proceeds as follows: Every switch begins by sending out BPDUs with a Root
Bridge ID equal to its own Bridge ID and a Sender Bridge ID of its own Bridge ID. The Sender Bridge ID
simply tells other switches who is the actual sender of the BPDU message. (After a Root Bridge is decided
upon, configuration BPDUs are only sent by the Root Bridge. All other bridges must forward or relay the
BPDUs, adding their own Sender Bridge Ids to the message.) Received BPDU messages are analyzed to
see if a “better” Root Bridge is being announced. A Root Bridge is considered better if the Root Bridge ID
value is lower than another. Again, think of the Root Bridge ID as being broken up into Bridge Priority and
MAC address fields. If two Bridge Priority values are equal, the lower MAC address makes the Bridge ID
better. When a switch hears of a better Root Bridge, it replaces its own Root Bridge ID with the Root
Bridge ID announced in the BPDU. The switch is then required to recommend or advertise the new Root
Bridge ID in its own BPDU messages; although, it will still identify itself as the Sender Bridge ID.
QUESTION 29:
Which of the following components must be elected before the Spanning Tree
Protocol can converge in a switched LAN?
A. Designated ports.
B. Duplex operating mode.
C. Fast mode ports.
D. Root bridge.
E. Root ports.
F. BDPU priority.
Answer: A, D, E

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