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Cisco CCNP SWITCH 642-813 Exam Questions with Explanation – Chapter 1(6-10)

Chapter 1 – Implement VLAN based solution, given a network design and a set of requirements

QUESTION NO: 6
What are some virtues of implementing end-to-end VLANs? (Choose two)
A. End-to-end VLANs are easy to manage.
B. Users are grouped into VLANs independent of a physical location.
C. Each VLAN has a common set of security and resource requirements for all members.
D. Resources are restricted to a single location.
Answer: B,C
Explanation:
In an end-to-end VLAN, users are grouped into VLANs independent of physical location and dependent on group or job function. Each VLAN has a common set of security requirements for all members.

QUESTION NO: 7 Which of the following statements is true about the 80/20 rule (Select all that apply)?
A. 20 percent of the traffic on a network segment should be local
B. no more than 20 percent of the network traffic should be able to move across a backbone.
C. no more than 80 percent of the network traffic should be able to move across a backbone.
D. 80 percent of the traffic on a network segment should be local
Answer: B,D
Explanation:
The 80/20 rule in network design originated from the idea that most of the traffic should remain local to the LAN, since bandwidth is plentiful compared to WAN links, and a great deal of broadcast traffic that is evident at the LAN is not passed over the backbone. Note: With the availability of inexpensive bandwidth and centralized data centers, this rule appears to have become obsolete. In fact, most networks have taken on the 20/80 rules, as opposed to the legacy 80/20 rule.

QUESTION NO: 8
The Company LAN is becoming saturated with broadcasts and multicast traffic. What could you do to help a network with many multicasts and broadcasts?
A. Creating smaller broadcast domains by implementing VLANs.
B. Separate nodes into different hubs.
C. Creating larger broadcast domains by implementing VLANs.
D. Separate nodes into different switches.
E. All of the above.
Answer: A
Explanation:
Controlling broadcast propagation throughout the network is important to reduce the amount of overhead associated with these frames. Routers, which operate at Layer 3 of the OSI model, provide broadcast domain segmentation for each interface. Switches can also provide broadcast domain segmentation using virtual LANs (VLANs). A VLAN is a group of switch ports, within a single or multiple switches, that is defined by the switch hardware and/or software as a single broadcast domain. A VLANs goal is to group devices connected to a switch into logical broadcast domains to control the effect that broadcasts have on other connected devices. A VLAN can be characterized as a logical network.
Reference: Building Cisco Multilayer Switched Networks (Cisco Press) page 8

QUESTION NO: 9
The Company LAN switches are being configured to support the use of Dynamic VLANs. Which of the following are true of dynamic VLAN membership? (Select all that apply)
A. VLAN membership of a user always remains the same even when he/she is moved to another location.
B. VLAN membership of a user always changes when he/she is moved to another location.
C. Membership can be static or dynamic.
D. Membership can be static only.
E. None of the other alternatives apply.
Answer: A,C
Explanation:
Dynamic VLAN memberships are based on the users MAC address connected to the port. If you have VTP server, a VTP database file, a VTP client switch, and a dynamic port; regardless of where your physical location is, you can still remain in the same VLAN.

QUESTION NO: 10
The Company LAN switches are being configured to support the use of Dynamic VLANs. What should be considered when implementing a dynamic VLAN solution? (Select two)
A. Each switch port is assigned to a specific VLAN.
B. Dynamic VLANs require a VLAN Membership Policy Server.
C. Devices are in the same VLAN regardless of which port they attach to.
D. Dynamic VLAN assignments are made through the command line interface.
Answer: B,C
Explanation:
With VLAN Membership Policy Server (VMPS), you can assign switch ports to VLANs dynamically, based on the source Media Access Control (MAC) address of the device connected to the port. When you move a host from a port on one switch in the network to a port on another switch in the network, the switch assigns the new port to the proper VLAN for that host dynamically. Note: There are two types of VLAN port configurations: static and dynamic.
Incorrect Answers
A:In a static VLAN, the administrator assigns switch ports to the VLAN, and the association does not change until the administrator changes the port assignment. However, this is not the case of dynamic VLANs. D:The Command Line Interface is not used for dynamic VLAN assignments.
Reference: Cisco Online, Configuring Dynamic Port VLAN Membership with VMPS

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