Layers of the OSI Cake
At which layer of the OSI model are IP addresses used for communication?
Layer 3 (Network Layer).
Which address type is assigned to a device's NIC and is unique on a local network?
MAC Address.
Which protocol uses a three-way handshake to establish a reliable connection?
TCP.
Which network device operates at Layer 1 and repeats signals to all connected devices?
HUB
What domain is limited to the devices connected to the same switch port?
Collision Domain.
Encapsulation at Layer 4 adds headers. What information do these headers typically include?
Port numbers and reliability features.
Which address is hierarchical and globally unique, used for routing between networks?
IP Address.
Which protocol is preferred for streaming services like Netflix or YouTube?
UDP
Which device learns MAC addresses and forwards data only to the intended recipient?
switch
What type of domain encompasses all devices that can receive a broadcast message?
Broadcast Domain.
When de-encapsulation occurs, at which layer is the transport header removed?
Layer 4 (Transport).
How many bits are in an IPv4 address?
32 bits.
Which protocol guarantees the order of data delivery, TCP or UDP?
tcp
Which device connects different networks and routes data based on IP addresses?
ROUTER
Which device breaks up collision domains, ensuring each port has its own domain?
Switch.
What type of encapsulation occurs at Layer 2, involving MAC addresses?
Data Link Layer encapsulation.
What type of address is used to identify a specific service or application running on a device?
Port Number
Which protocol does not retransmit lost packets but is faster?
udp
What device filters traffic based on security rules and can block or allow specific protocols?
FIREWALL
Which device is used to break up broadcast domains?
router
Which OSI layer is responsible for ensuring end-to-end communication reliability?
Layer 4 (Transport).
What is the address type used for one-to-all communication within a local network?
Broadcast Address.
In which protocol is the size of the header typically smaller, TCP or UDP?
UDP
What device connects wireless devices to a wired network?
access point
Why is breaking up collision domains important in a network?
To reduce data collisions and improve network efficiency