Network Fundamentals Flashcards

Which OSI layer is responsible for logical addressing and routing packets between networks?

Answer: Network

The Network layer (Layer 3) handles logical addressing via IP and determines the best path for packet delivery across interconnected networks.

What is the default subnet mask for a Class B IP address?

Answer: 255.255.0.0

Class B addresses use a default subnet mask of 255.255.0.0, providing 16 bits for the host portion of the address.

Which protocol dynamically assigns IP addresses to devices on a network?

Answer: DHCP

DHCP (Dynamic Host Configuration Protocol) automatically assigns IP addresses, subnet masks, default gateways, and DNS server addresses to network clients.

In a star topology, if the central switch fails, what is the impact on the network?

Answer: All connected devices lose connectivity

In a star topology, all devices connect to a central switch, so failure of that switch results in complete loss of connectivity for all attached devices.

What does the acronym VLAN stand for in network terminology?

Answer: Virtual Local Area Network

VLAN stands for Virtual Local Area Network, a logical segmentation of a physical network that groups devices regardless of their physical location.

Which cable category is rated for 10 Gigabit Ethernet up to 100 meters?

Answer: Cat 6A

Cat 6A (Augmented Category 6) supports 10 Gigabit Ethernet at frequencies up to 500 MHz over distances up to 100 meters.

What is the maximum segment length for 100BASE-TX Fast Ethernet over twisted-pair cable?

Answer: 100 meters

100BASE-TX Fast Ethernet has a maximum segment length of 100 meters when using Category 5 or better UTP cable.