Examining Cisco Enterprise Network Architecture Flashcards
Which Cisco Enterprise Architecture module is a network design that spans a fixed geographic area consisting of a building or group of buildings connected into one network with many network segments?
Enterprise Campus
It follows a three tier architecture with access, distribution, and core tiers with a data center submodule for centralized shared resources.
Which Cisco Enterprise Architecture module provides connectivity outside the enterprise, often providing internet connectivity to one or more ISPs?
Enterprise Edge
Functions as an intermediary for the enterprise campus module. Provides internet connectivity to one or more ISPs, remote access termination, site to site VPN services, and WAN connectivity.
Which Cisco Enterprise Architecture module provides connectivity between the main enterprise site and its remote locations?
Service Provider Edge
What are the key concepts that should be addressed when designing a reliable and versatile network?
Self-healing - continuously available
Self-defending - Protecting the organization and its users
Self-optimizing - Adapting to changing needs beyond the limits of basic standards
Self-aware - Driving change through insight into network activity
Match the Cisco Enterprise Architecture module with its definition.
Follows the three-tier architecture with access, distribution, and core tiers.
Contains submodules that provide internet connectivity to one or more ISPs.
Provides connectivity between the main enterprise site and its remote locations.
Represents geographically distant parts of the enterprise network.
Options:
Enterprise Campus
Remote Locations
Service Provider Edge
Enterprise Edge
Follows the three-tier architecture with access, distribution, and core tiers. (Enterprise Campus)
Contains submodules that provide internet connectivity to one or more ISPs. (Enterprise Edge)
Provides connectivity between the main enterprise site and its remote locations. (Service Provider Edge)
Represents geographically distant parts of the enterprise network. (Remote Locations)
What type of network is created by interconnecting a group of LANs spread over a small geographic area?
campus network
What are the three layers of the enterprise campus design?
access
distribution
core (backbone)
Describe the access layer.
- Used to grant user access to the network.
- Switched LAN devices with ports to connect end user devices (workstations/servers)
- Dedicated special-purpose layer: dedicated to meeting the functions of end-device connectivity.
Describe the distribution layer.
- Aggregates access switches and uplinks.
- Provides redundant connections and devices for high availability.
- Serves as a service and control boundary between the access layer and the core.
- Aggregates WAN connections at the edge of the campus and provides policy-based routing, filtering, and QoS.
Describe the core (backbone) layer.
High speed backbone designed to switch packets as fast as possible.
High level of availability
Adapts quickly to changes.
Scalability and fast convergence
Dedicated special-purpose layer: provides nonstop connectivity across the entire campus network.
Describe a layer 2 and a layer 3 access layer design.
Layer 2 switching (bridging) - VLANs are terminated at the distribution layer, and half the uplinks are blocked by spanning tree.
Layer 3 routing - VLANs are terminated on the access layer devices. Links between the access layer and distribution layer are routed, allowing for all links to be utilized.
Which statement about a flat network design is true?
a. A flat network has multiple subnets.
b. All devices on this subnet have dedicated bandwidth.
c. All devices are on different broadcast domains.
d. A broadcast packet is processed by all devices and uses CPU time on each device within the broadcast domain.
d. A broadcast packet is processed by all devices and uses CPU time on each device within the broadcast domain.
The ___ layer is where routing and packet manipulation are performed.
Distribution
Represents a redistribution point between routing domains.
Performs controlled routing decision-making and filtering tasks.
Commonly used to terminate VLANs from access layer switches.
What are the three distribution layer design models?
Traditional distribution layer design
Simplified distribution layer design
Software-Defined Access design
What are the special purpose functions of the access and core layers?
Access layer - dedicated to meeting the functions of end device connectivity
Core layer - provides nonstop connectivity across the entire campus network
