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WorksheetsTest Exercise
Total questions: 10
Worksheet time: 5mins
What does “self-learning” mean in the context of Ethernet switches?
They download forwarding tables from a central controller
They use DNS to map IP addresses to ports
They build forwarding tables by observing source MAC addresses in incoming frames
They run routing protocols like OSPF
In the context of link-layer services, what does source “half-duplex” mean?
Nodes can transmit or receive, but not at the same time
Only one node can transmit at a time on the network
Nodes can transmit and receive simultaneously
Data flows in one direction only
What is encapsulated inside a link-layer frame?
UDP packet
IP datagram
TCP segment
HTTP message
Which multiple access method is used in Bluetooth networks?
CSMA/CD
Polling
Slotted ALOHA
FDMA
In a LAN using Ethernet, if two nodes begin transmitting at nearly the same time and cause a collision, which mechanism does Ethernet use to determine when they should retransmit?
Ethernet uses the exponential backoff algorithm to determine when nodes should retransmit after a collision.
Ethernet uses a fixed time delay for retransmission after a collision.
Ethernet uses a token passing mechanism to decide retransmission after a collision.
Ethernet uses a priority-based scheduling system for retransmission after a collision.
In a data center, a load balancer operates at which layer to distribute incoming client requests?
Link layer
Network layer
Transport layer
Application layer
Which protocol is used in Ethernet to avoid collisions on a shared medium?
ARP
CSMA/CD
TCP
DHCP
In a LAN using Ethernet, if two nodes begin transmitting at nearly the same time and cause a collision, which mechanism does Ethernet use to determine when they should retransmit?
TDMA scheduling
Polling from a central controller
Token passing
Exponential backoff
In the “day in the life” scenario, before sending an HTTP request, what does the client need first from a DNS server?
MAC address of the web server
IP address of the web server
MPLS label
VLAN ID
Which multiple access method divides the channel by frequency bands and assigns each node a fixed band?
Token passing
CSMA
TDMA
FDMA
