Term
| What are the sections of an Enterprise Network |
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Definition
1. Core Backbone
2. Campus
3. Data Center
4. Branch/WAN
5. Internet Edge |
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Term
| What is the campus part of the Enterprise Network |
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Definition
| provides access to network communication services and resources to end users and devices |
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Term
| What is the data center portion of the Enterprise Network |
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Definition
| generally understood to be a facility used to house computing systems and associated components. |
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Term
| Enterpise network can also be called what? |
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Definition
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Term
| What does the Branch/WAN protion of the Campus Network hold? |
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Definition
| contains the routers, switches, and son to interconnect a main office to branch offices and interconnect multiple main sites |
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Term
| What does the internet edge portion of the enterprise network contain? |
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Definition
| portion of the network that encompasses the routers, switches, firewalls, and network devices that interconnect the enterprise network to the internet |
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Term
| What are the 3 Campus designs? |
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Definition
1. Modular
2. Resilient
3. Flexibility |
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Term
| Modular Campus Design features |
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Definition
easily supports growth and change.
uses building blocks called pods or moduals
scaling the network is eased by adding new moduales instead of complete designs |
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Term
| Layer 2 networks are limited and do not achieve what characteristics? |
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Definition
1. Scalability
2. Security
3. Modularity
4. Flexibility
5. Resiliency
6. High Availability |
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Term
| Hierarchical model for campus design |
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Definition
1. Access layer
2. Distribution Layer
3. Core Layer |
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Term
| What does the access layer do int the hierarchical campus design? |
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Definition
grants user, server, or edge device access to the network.
very feature rich
security
access control
filters
management |
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Term
| What does the distribution layer do in the hierarchical campus design? |
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Definition
aggregates the wiring closets, using switches to segment working-groups and isolate network problems in a campus environment.
aggregates WAN connections at the edge of the campus and provides an level of securtiy.
acts as a service and control boundary between access and core. |
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Term
| Core layer of hierarchical campus design |
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Definition
high-speed backbone, designed to swtich packets ASAP.
connects other switches a mimimum of 10 gigibit ethernet. |
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Term
| Hierarchical campus model is good because it |
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Definition
1. provides modularity
2. easier to understand
3. increases flexability
4. eases growth and scalability
5. provides for network predictability
6. Reduces troubleshooting complexity |
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Term
| benifits to layer 3 switching |
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Definition
routed interface
security
routing
load balancing
traffic analyisis |
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Term
| Disadvantages of Layer 3 switching |
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Definition
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Term
| campus design provides what five things? |
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Definition
| security, flexability, scaleability, manageability, availability |
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Term
| Layer 2 switching features |
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Definition
Designed for near wire-speed performance
built using high-speed, specialized ASICs
Switches at low latency
single point of failure
bottle necks
some secuirty
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Term
| Layer 2 switching downfalls |
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Definition
not felxable
not modual
not resilant |
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Term
| Layer 2 switching benifits |
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Definition
cheap
fast
easy to manage |
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Term
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Definition
| frames forwarded by the switch but not modified in anyway. |
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Term
| Layer 3 switching support what protocols? |
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Definition
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Term
| Layer 2 switching is what? |
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Definition
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Term
| Layer 2 switching supports layer 3 functionality such as |
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Definition
IGMP snooping
QoS marking |
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Term
| to do layer 3 switching you need to be able to what? |
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Definition
rewrite the frames.
validates teh integerity of he l3 packet header via l3 checklst
verifies and decrients packet TTL expiration
updates l2 CRC durring rewrite
updates forwarding statistics for network management apps
applies security contols and classification of serivice required |
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Term
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Definition
- scalable modular switch up to 13 slots
- supports up to 16 10-gig eth ints per slot
- up to 80 GBPS of bandwidth ber slot in current gen hardware
- optionaly supports up to L7 features with specialized modules
- intergrated redundant and high-available power supplies, fans, and supervisor engineers
- Supports L3 Non-stop forwarding NSF
- backward capability
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Term
| hardware-switching refers to? |
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Definition
| teh act of pricessing packets at any layers 2 -7 via specialized hardware components referred to as application-specific intergrated ciruits (ASIC) |
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Term
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Definition
- network management
- vioce (IP telephony)
- IP Multicast
- Normal Data
- Scavenger class
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Term
| Client-Enterprise Edge applications |
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Definition
| use servers on the enterprise edge to exchange data between the orgainzation and its public servers. |
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Term
IIN Intelligent Information Network three phases
(logical constructs) |
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Definition
intergrated trasnport
services
application |
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Term
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Definition
| service-orinented netowrk architecture |
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Term
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Definition
- convergance, virtualization
- cost savings
- increased productivity
- faster deployment of new services and applications
- enhanced buisness process
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Term
| why do you need a core layer? |
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Definition
| so you don't have to mesh the distrobution layer. |
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Term
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Definition
- found in distro layer or calapsed core
- Scalable module switch with up to 10 slots
- supports multipule 10 gig eth int per slot
- supports cisco IOS
- supports both L2 and L3 switching
- optionaly supports intergrated redundant and high-avalilable power supplies and supervisor engines
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Term
| Catalyst 4948G, 3750, and 3560 family |
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Definition
- available in variety of fixed port configs with up to 48 1 gbps access layer ports
- suports Cisco IOS
- Supports both L2 and L3 switching
- Not architected with redundant hardware
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Term
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Definition
- Available in variety of fixed port configs with up to 48 1-gbps access layer ports and 10-gig ehth uplinks
- supports Cisco IOS
- Supports L2 switching
- not architected with redundant hardware
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Term
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Definition
- data center switch
- modular switch with up to18 slots
- supports up to 230 Gbps per slot
- supports Nexus OS
- 10-slot chassis is built on front-to-back airflow
- supports redundant surpervisor engines, fans, and power supplies
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Term
| what are important considerations at the Distrobution level? |
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Definition
Availalbiity
Fast path recovery
load balancing
QoS |
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Term
| What enhancements does the distrobution layer add to the campus network design? |
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Definition
- aggregates access layer switches
- segments the access layer for simplicity
- summarizes routing to access layer
- always dual-connected to upstream core layer
- optionally applies packet filtering, security features, and QoS features
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Term
| What does the core layer do in the campus network? |
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Definition
- aggregates multiple distor switches in the distro layer with the remainder of the network
- provides the aggregation pints with redundancy through fast convergence and high availability
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Term
| what is considered a small network? |
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Definition
| less than 200 end devices |
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Term
| What is considered a medium network? |
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Definition
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Term
| What is a large campus design? |
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Definition
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Term
| What does PPDIOO stand for? |
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Definition
P - Prepare
P- Plan
D- Design
I - Implement
O- Operate
O- Optimize |
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Term
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Definition
establising organization requirements
developing work stratagy
proposing a high-level conceptual architecture |
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Term
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Definition
identifing initial requierments based on goals, facilities, users needs
involves chariacterizing sites and assessing any existing networks
project a plan for helping managing tasks |
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Term
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Definition
| initial requirements that were derived in the planning phase drive the activites of teh network design |
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Term
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Definition
| network is built or additional components are incorpprated according to the disign specifications |
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Term
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Definition
is the final test of the appropiateness of teh design
involves maintaining network health throught day-to-day operations
Fault detection, correction, and performance monitoring |
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Term
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Definition
involves proactive management of the network
to identify and resove issues before the affect the organization. |
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Term
| What are the main reason for applying a lifecycle approach to campus design |
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Definition
- Lowering the total cost of network ownership
- increasing network availabity
- improving business agility
- Speeding access to applications and services
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Term
| Ways a proper network lifecycle approach aids in lowering costs |
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Definition
- identifing and falidating tech requirements
- planning for infrastructure changes and resource requirements
- develope a sound network design
- accelerationg successfull implementation
- improving efficancy of the network
- reducing operating expeses
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