Week5-Technology: Internets and Packets
- Common Link Layer technologies are…
- Cable Modem
- **When looking at addresses form most general to most specific, we read IP addresses ________ and we read domain addresses _________. **
- left to right, right to left
- When do wireless devices receive their serial numbers (i.e. MAC or Ethernet addresses)?
- When they are manufactured
- What does the time taken for a packet to reach a destination usually reflect?
- The speed of light and the distance the packet has to travel
- How do wireless devices operating on a shared network determine when to send information so as not to incur chaos?
- They listen to the sound on the current network, and send information when it is quiet.
- What is the concern when deciding which device sends information next on Ethernet?
- Ensuring fairness – that one type of device, data, or user is not preferred over others.
- What is the maximum possible number of hops a packet can take to try to reach their destination (the so-called “Time To Live” functionality of packets)?
- What are Router Tables?
- Dynamic lists of directions for where and how to direct packets
- What are the layers, and in what order do we structure them?
- Application Layer
- What is the Internet Protocol Layer responsible for?
- Getting a packet to a specific network address
- How is an IP address determined?
- The prefix of an IP address determines what?
- The network that it belongs to
- What is the Link Layer responsible for?
- Deciding on the next link that a packet should be sent on once it is inside of a router
- Is it possible to track a packet’s journey across the network?
- Yes, using a technique called ‘traceroute’ which tracks the packets that are returned due to transmission failure.
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