Chapter 1: Internetworking
Written Lab 1.1
- The Application layer is responsible for finding the network resources broadcast from a server and adding flow control and error control (if the application developer chooses).
- The Physical layer takes frames from the Data Link layer and encodes the 1s and 0s into a digital signal for transmission on the network medium.
- The Network layer provides routing through an internetwork and logical addressing.
- The Presentation layer makes sure that data is in a readable format for the Application layer.
- The Session layer sets up, maintains, and terminates sessions between applications.
- PDUs at the Data Link layer are called frames. As soon as you see frame in a question, you know the answer.
- The Transport layer uses virtual circuits to create a reliable connection between two hosts.
- The Network layer provides logical addressing, typically IP addressing and routing.
- The Physical layer is responsible for the electrical and mechanical connections between devices.
- The Data Link layer is responsible for the framing of data packets.
- The router searches the routing table to determine where to forward the packet.
- The Data Link layer frames packets received from the Network layer.
- The Transport layer segments user data.
- The Network layer creates packets out of segments handed down from the Transport layer.
- The Physical layer is responsible for transporting 1s and 0s in a digital signal.
- Segments, packets, frames, bits
- Transport
- Data Link
- Network
- 48 bits (6 bytes) expressed as a hexadecimal number
Written Lab 1.2
| Description | Device or OSI Layer |
| This device sends and receives information about the Network layer. | Router |
| This layer creates a virtual circuit before transmitting between two end stations. | Transport |
| This layer uses service access points. | Data Link (LLC sublayer) |
| This device uses hardware addresses to filter a network. | Bridge or switch |
| Ethernet is defined at these layers. | Data Link and Physical |
| This layer supports flow control and sequencing. | Transport |
| This device can measure the distance to a remote network. | Router |
| Logical addressing is used at this layer. | Network |
| Hardware addresses are defined at this layer. | Data Link (MAC sublayer) |
| This device creates one big collision domain and one large broadcast domain. | Hub |
| This device creates many smaller collision domains, but the network is still one large broadcast domain. | Switch or bridge |
| This device can never run full duplex. | Hub |
| This device breaks up collision domains and broadcast domains. | Router |
Written Lab 1.3
- Hub: One collision domain, one broadcast domain
- Bridge: Two collision domains, one broadcast domain
- Switch: Four collision domains, one broadcast domain
- Router: Three collision domains, three broadcast domains
Written Lab 1.4
- Convert from decimal IP address to binary format.
Complete the following table to express 192.168.10.15 in binary format:
Complete the following table to express 172.16.20.55 in binary format:
Complete the following table to express 10.11.12.99 in binary format:
- Convert the following from binary format to decimal IP address.
Complete the following table to express 11001100.00110011.10101010.01010101 in decimal IP address format:
Complete the following table to express 11000110.11010011.00111001.11010001 in decimal IP address format:
Complete the following table to express 10000100.11010010.10111000.10100110 in decimal IP address format:
- Convert the following from binary format to hexadecimal.
Complete the following table to express 11011000.00011011.00111101.01110110 in hexadecimal:
Complete the following table to express 11001010.11110101.10000011.11101011 in hexadecimal:
Complete the following table to express 10000100.11010010.01000011.10110011 in hexadecimal:
