4.0.1.2 Sent or Received (Instructor Version – Optional Lab)
Instructor Note: Red font color or gray highlights indicate text that appears in the instructor copy only. Optional activities are designed to enhance understanding and/or to provide additional practice.
Objectives
Describe convergence of data, voice, and video in the context of switched networks.
Students will be able to explain how switches can help LAN end devices send and receive data, voice and video data.
Scenario
Individually, or in groups (per the instructor’s decision), discuss various ways hosts send and receive data, voice, and streaming video.
- Develop a matrix (table) listing network data types that can be sent and received. Provide five examples.
Your matrix table might look something like this:
| Sent | Received |
|---|---|
| Client requests a web page from a web server. |
Web server send web page to requesting client. |
Save your work in either hard- or soft-copy format. Be prepared to discuss your matrix and statements in a class discussion.
Resources
Internet connectivity
Reflection
1. If you are receiving data, how do you think a switch assists in that process?
_________________________________________________
Students should mention that switches process data to and from end devices – many users can be sending and receiving data at the same time.
2. If you are sending network data, how do you think a switch assists in that process?
_________________________________________________
Switches allow multiple recipients to send and receive data simultaneously. Compared to hubs, a switch allows for better used of the bandwidth.
Matrix Answers (will vary)
Instructor Note: This is a representative model that might be “built” as a result of this activity:
| Sent | Received |
|---|---|
| Client requests a web page from a web server. | Automatic updates to your cell telephone applications Web server send web page to requesting client. |
| Client requests a file from a FTP server. | FTP server sends the requested file to the client. |
| Client requests a streaming video from a server. | Server transmits video to requesting clients. |
| Bob sends instant message to Mary. | Mary receives instant from Bob. |
| Ethernet switch receives an Ethernet frame on ingress port 1. | Ethernet switch forwards frame out egress port 4. |
| Bob sends VoIP packets from his IP phone. | Mary receives VoIP packets on her IP phone. |
So impressive