Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

25 Cards in this Set

  • Front
  • Back
Why does the 3-layer heirarchal model simplify building a network?
it focuses on 3 functional areas, rather than packet construction
What are the three functional areas?
core layer, distribution layer, and access layer
What sort of equipment is in the core layer?
high-end switches and high-speed cable, such as fiber
What layer is responsible for routing LAN traffic?
the distribution layer
What layers are responsible for packet manipulation?
the distribution and access layers
What are the two primary duties of the core layer?
speed and reliable delivery
What sort of equipment is used at the distribution layer?
LAN-based routers and Layer-3 switches
What layer is responsible for ensuring that packets are properly routed between subnets and VLAN's?
the distribution layer
What is another name for the distribution layer?
the Workgroup layer
What sort of equipment is used in the access layer?
hubs and switches
What does the access layer do?
ensures packets are delivered to end user computers
What is another name for the access layer?
the Desktop layer
What are five benefits of Cisco's heirarchical model?
high performance; efficient management and troubleshooting; policy creation; scalability; and behavior prediction
What three factors should be considered when designing core-layer devices?
high data-transfer rate, including load sharing; low latency period; and high reliability, including multiple data paths
Why does the core layer not enforce policy?
it would introduce too much latency
What layer is responsible for routing?
the distribution layer
What layer provides policy-based connectivity?
the distribution layer
What are six examples of policy-based connectivity provided by the distribution layer?
packet filtering; QoS; Access Layer aggregation point; controlling broadcast and multicast; application gateways; and queuing and packet manipulation
What does a route summary do?
consolidates traffic from multiple subnets into a single network connection
What command will retrieve a routing summary from Cisco routers?
show ip route summary
What layer gives the ability to expand or contract a collision domain?
the access layer
What devices can be used to expand or contract a collision domain?
a repeater, hub, or switch
What is a collision domain?
a part of an OSI physical layer where any communication sent by a node can be sensed by any other node on that collision domain
What is a broadcast domain?
part of OSI Layer 2/3 where a node can broadcast to any other node on that broadcast domain
What four tasks does the access layer allow?
MAC address filtering; creating separate collision domains (w/ switch); share bandwidth; and manage switch bandwidth