Cisco - Jumpstart - Lan - Set 2

Front 1

Name 5 models of chassis available for the 6500 series switches

Back 1

1. 6503
2. 5604
3. 6506
4. 6509 [Ve is the vertical version]
5. 6513

Front 2

What is the purpose of MSFC?

Back 2

Multilayer Switch Feature Card (MSFC)

for control Plane and layer 3 capabilities

Front 3

What is a Control Plane

Back 3

The Control-plane Policing feature allows Quality of Service (QoS) policing of aggregate control-plane traffic destined to the route processor.

Front 4

What is the purpose of the PFC?

Back 4

Policy feature card

• for hardware-based packet forwarding
• Data Plane
• More

Front 5

What is a data plane?

Back 5

The data plane is the workhorse of the switching elements in our networks.

parsing packet headers (or cells, SONET) in high speed search ASICs.
manages QOS
filtering
encapsulations
Queuing

Front 6

What is the purpose of the switch fabric?

Back 6

Provides high-bandwidth connectivity between slots in the 6500 chassis

Front 7

What is VRF

Back 7

Virtual Routing and Forwarding

is an IP technology that allows multiple instances of a routing table to coexist on the same router at the same time

Front 8

What is CEF?

Back 8

Cisco Express Forwarding

• advanced, Layer 3 IP switching technology.
• optimizes network performance
• scalability for networks with large and dynamic traffic patterns

Front 9

What is DFC?

Back 9

Distributed Forwarding

This is a less invasive means of looking up the routing table. The table is accessed from the line card instead of the CPU

Front 10

Why would a customer pay extra money to obtain DFC line cards instead of "regular" (non-DFC) line cards for their 6500 series switch?

Back 10

• Its faster
• hardware upgrade
• increased performance on line cards by expert functionality instead of by the supervisor

Front 11

Service modules only exist for what series?

Back 11

6500 series

Front 12

What is WiSM

Back 12

Wireless Services Module

• control
• scalability
• reliability
• secure, enterprise-scale indoor and outdoor 802.11 wireless networks
• enables enterprises and service providers to create and enforce policies that support business-critical applications.

Front 13

What is Nam

Back 13

Network Analysis Module

The NAM Traffic Analyzer Software is an embedded, Web-enabled management station that monitors, analyzes, and troubleshoots traffic that traverses the various data sources

Front 14

What is mSTP?

Back 14

MSTs (IEEE 802.1s) combine the best aspects from both the PVST+ and the 802.1q. The idea is that several VLANs can be mapped to a reduced number of spanning tree instances because most networks do not need more than a few logical topologies.

Front 15

What is IA

Back 15

Instant Access

simplifies operation through a single point
of operation and management for campus access and backbone.

Front 16

What virtualization mechanism was invented by Cisco Systems?

Back 16

VSS-Virtual Switching System

Pools multiple Cisco switches into 1 virtual switch
Single file configuration
one gateway IP address per VLAN

Front 17

What is a tranceiver?

Back 17

A device that can both transmit and receive communications, in particular a combined radio transmitter and receiver

Front 18

What are 3 layers you typically find in a LAN?

Back 18

• Access
• Distribution
• Core

Front 19

What are attached at the end of the access layer switches?

Back 19

Endpoints

Front 20

Uplink ports are usually in ____mode?

Back 20

Trunk

Front 21

If you need more bandwidth on an uplink trunk what can you do to provide those services

Back 21

Enable EtherChannel

Front 22

Is EtherChannel layer 2 or 3?

Back 22

• usually layer 2
• if the interfaces in the EtherChannel are configured at layer 3 than it operates at layer 3 (cost more)

Front 23

What are some items attached to an access layer switch?

Back 23

• Access Points
• Printers
• EndPoints
• PoE Devices
• Leaf Node
• Routers
• Data Center
• Internet
• VPN
• Intranet

Front 24

What is the server needed for a data center?

Back 24

Nexus

Front 25

Once you have 2 core switches to your topology would there be a benefit to adding a 3rd or a 4th core switch?

Back 25

No

You just need one for redundancy

Front 26

When can you get away with using a collapsed core?

Back 26

When you can terminate at the switch

Front 27

What happens when you lose an equal cost multiplier (upstream hop) what happens to the routing table?

Back 27

• Depends on the routing protocol
• All the routes are removed from the routing table
• Convergence time is affected based on routing protocol

Front 28

If you have load balancing enabled and a link goes down what happens?

Back 28

The convergence time is usually quick wile the good link picks up the entire load

Front 29

What is the downside when you have a non-loop linkage between the access layer and the distribution layer, and you lose spanning tree and you have EtherChannel in place?

Back 29

• Broadcast Storm
• It will saturate any trunk that carries the VLAN

Front 30

What is BPDU Gaurd

Back 30

Bridge Protocol Data Unit Gaurd

• Disables ports that receive a BPDU frame
• Data messages exchanged across the switches within an extended LAN that uses STP topology
• The loops are then removed by shutting down selected bridge interfaces and placing redundant switch ports in a backup, or blocked state

Front 31

What are BPDU Packets

Back 31

They contain information on ports addresses, priorities and cost and ensure that the data ends up where it was intended to go.

Front 32

What are BPDU Messages?

Back 32

They are unit of data exchanged across bridges to detect loops in a network topology

Front 33

What is Portfast?

Back 33

PortFast causes a port to enter the forwarding state almost immediately by dramatically decreasing the time of the listening and learning states. Portfast minimizes the time it takes for the server or workstation to come online

Front 34

What are the 3 evils of not turning portfast on

Back 34

• port will not come up immediately causing issues for dhcp, dns etc
• port will go through listening, learning phases for normal STP processes taking time
• It will allow BPDUs to enter the port causing a spanning tree recalculation

Front 35

What does the distribution layer introduce that traditionally the access layer did not use

Back 35

• Routing ***
• Aggregate
• QoS
• Distribution Layer Switches (IDF/MDF)
• Centralized distribution Switch
• VLAN interface
• Availabilty
• Load Balancing

Front 36

What is the drawback of moving layer 3 into the access layer?

Back 36

• Cost
• Isolation of Bases
• Trust Boundary
• QoS

Front 37

What are a few things that can drive up cost when moving layer 3 into the access layer?

Back 37

• IP Base
• Licensing

Front 38

Why are bases isolation of bases a drawback when moving layer 3 into the access layer

Back 38

If you look at the picture when the core layer is involved areas are isolated so if there is a problem less devices will be affected during an outage.

Front 39

What is Trust boundry

Back 39

A trust boundary can be thought of as line drawn through a program. On one side of the line, data is untrusted. On the other side of the line, data is assumed to be trustworthy. The purpose of validation logic is to allow data to safely cross the trust boundary - to move from untrusted to trusted.

Front 40

What is QoS

Back 40

Quality of Service (QoS) is a feature of routers and switches which prioritizes traffic so that more important traffic can pass first. The result is a performance improvement for critical network traffic. QoS equipment is useful with VoIP phones or in LANs with high volumes of local traffic

Front 41

What are some benefits of QoS?

Back 41

• It makes troubleshooting easier
• You can install a new device at that layer
• Organization

Front 42

What are the two ways to multicast more efficient?

Back 42

• Multicast vlan (additional configuration)
• one copy will arrive on the trunk and the switch will copy and send it out

Front 43

What is important about trust boundry?

Back 43

The closer to the source the better

Front 44

QoS happens at what layer?

Back 44

• Access
• Distribution

Front 45

Key Points of the Core Layer

Back 45

• backbone for the network
• Separates the core layer
• helps in scalability during future growth

Front 46

What is a collapsed core

Back 46

In small networks it is a common practice to use a collapsed core model to where the distribution layer and core are merged into one layer.

Front 47

Why do you use a collapsed core?

Back 47

• Scaleability (small scale)
• Redundacy
• Performance
• Security
• Manageability
• Maintainability

Front 48

Do I need a Core Layer

Back 48

• The larger the network the greater need for a core layer
• small infrastructures can get away with removing the core
• with a core the IGP number is less

Front 49

UDLD

Back 49

Uni-Directional Link Detection

Puts unidirectional links into blocking state and prevents forwarding loops

Front 50

Where is a BPDU Guard Useful?

Back 50

for edge ports that should never be connected to another switch

Front 51

Bridge Assurance

Back 51

Cisco protocol that replaces the STP loopgaurd in some equipment

Front 52

Some of the Features of Bridge Assurace

Back 52

• UDLD
• BPDU Guard
• Loop Gaurd
• Root Gauard
• EtherChannel Guard
• Bridge Priority

Front 53

What is loop Gaurd?

Back 53

Protects against ports where the link becomes unidirectional

Front 54

What is Root Guard?

Back 54

Prevents port from becoming a root port or blocked port

Front 55

What is EtherChannel guard?

Back 55

Prevents inconsistent configuration of Etherchannel that creates loops between two switches

Front 56

What is Bridge Priority?

Back 56

Defines the root bridge in an STP domain

Front 57

What does loopgaurd go?

Back 57

The down link side from the access layer

Front 58

Why have the characteristics of access layer distribution changed from 24-1 to 12-1 [endpoint-routers]

Back 58

Web applications

Front 59

Why would you use 10G interfaces

Back 59

to connect

• uplink
• servers
• next step after link aggregation with 1g
• two connections between each distribution switch for load balancing

Front 60

What would be the benefit of implementing EtherChannel to a non-technical audiance?

Back 60

Bandwidth
Fault Tolerance

Front 61

What are the possible IA parent Switches

Back 61

• 6800
• 6500

Front 62

What are the posssible ia child switches

Back 62

6848ia with or without PioE

Front 63

What is the maximum number of access ports available with ia 1008

Back 63

1000

Front 64

What is the maximum number of stacked 64848ia

Back 64

3

Front 65

What is the maximum number of stacked 6848ia phase 2

Back 65

5

Front 66

What are the benefits of redundancy

Back 66

• uptime
• fault tolerance

Front 67

What are the business benefits of routing to the edge

Back 67

• Apply policy earlier on, causing the network to be more efficient
• Failover