The TCP/IP Five-Layer Network Model
Which layer of the TCP/IP model represents physical devices interconnecting computers?
Physical Layer
What are the two main categories of networking cables?
Copper and fiber
What is the role of ones and zeros in networking?
They represent the smallest unit of data
What is the role of MAC addresses in computer identification?
They serve as a unique identifier for network interfaces
What is Crosstalk?
Crosstalk is when an electrical pulse on one wire is accidentally detected on another wire
What is the responsibility of the Data Link Layer?
Responsible for data transmission within the same network or link
Which network device allows connections from multiple computers simultaneously but creates a collision domain?
Hub
What is the primary function of modulation and line coding?
To vary the voltage of electrical charges across network cables
How long is the MAC address in bits?
48 bits
What is a payload?
The actual data being transported, which is everything that isn't a header
What is the main responsibility of the Network Layer?
Facilitating communication between different networks via routers
What is a characteristic of switches compared to hubs?
Inspects ethernet protocol data to direct it only to the intended system
What is the structure of a Cat6 cable?
Four twisted pairs within a single jacket
What is the purpose of the first three octets of a MAC address?
They represent the organizationally unique identifier (OUI).
What is Modulation?
A way of varying the voltage of a constant electrical charge moving across a standard copper network cable
Which protocol is commonly used by the Data Link Layer?
Ethernet
What is the primary function of routers?
Forward data between independent networks
When might a crossover cable be used?
To connect two computing devices directly
What technique does Ethernet use to prevent data corruption due to collisions?
Carrier Sense Multiple Access with Collision Detection (CSMA/CD)
What's the difference between unicast and multicast?
unicast communication is one-to-one, targeting a single recipient, while multicast communication is one-to-many, targeting multiple recipients who have expressed interest in receiving the data.
Responsible for determining which client and server programs receive data, this layer employs common protocols like TCP (Transmission Control Protocol) for reliable data delivery and UDP (User Datagram Protocol) for non-reliable delivery.
the Transport Layer
At which layer of the OSI model do routers operate?
Network Layer
What are patch panels used for in a network setup?
To connect cable endpoints to switches or routers
What does the Ether-type field in an Ethernet frame describe?
Protocol of the frame's contents
What is User Datagram Protocol?
A transfer protocol that does not rely on connections. This protocol does not support the concept of an acknowledgement. With UDP, you just set a destination port and send the data packet