1. Why does the data communication industry use the layered OSI reference model? (Choose two.) A:It divides the network communication process into smaller and simpler components, thus aiding component development, design, and…
Tag: OSI
CCNA 640-802 Bible – OSI and TCP/IP models
1. At which layers of the OSI model do WANs operate? (Choose two.) A:application layer B:session layer C:transport layer D:network layer E:datalink layer F:physical layer Correct Answers: E, F Explanation:
The TCP/IP Model
TCP/IP and the OSI Reference Model As illustrated in Figure 1.2, the TCP/IP model consists of four layers, each of which can have several sublayers. These layers correlate roughly to layers in…
The 7 Layer OSI Model
The OSI Reference Model The OSI is the Open System Interconnection reference model for communications. As illustrated in Figure 1.1, the OSI reference model consists of seven layers, each of which can…
CCNA Quick Notes – Frame Relay
1.What protocol does Frame Relay rely on for error checking? Frame Relay does not rely on any certain protocol for error checking. Instead, it relies on upper-layer protocols to provide error checking….
CCNA Quick Notes – Internetworking
1.What are the three layers of the Cisco Hierarchical Model? The three layers of the Cisco Hierarchical Model are:1 The access layer The distribution layer The core layer 2.In the Cisco Hierarchical…
CCNA Quick Notes – LAN
1. What is carrier sense multiple access collision detect (CSMA/CD)? CSMA/CD describes the Ethernet access method. In CSMA/CD, many stations can transmit on the same cable, and no station has priority over…