Switching Concepts
store-and-forward
A data transmission method used to send data to a server or router where the data is stored until the next hop becomes available.
Which two statements are true about half-duplex and full-duplex communications? (Choose two.
Full duplex increases the effective bandwidth Full duplex allows both ends to transmit and receive simultaneously
MAC Address Table (MAT)
Human-readable format of MAC addresses and associated ports
What is the purpose of frame buffers on a switch?
They hold traffic, thus alleviating network congestion.
What is the significant difference between a hub and a Layer 2 LAN switch?
a switch created many smaller collision domains, and a hub increases the size of a single collision domain
cut-through switching
a switching method that begins the forwarding process as soon as enough information has been received to make a forwarding decision
Which statement is true about broadcast and collision domains?
adding a switch to a network will increase the size of the broadcast domain.
What is one function of a Layer 2 switch?
determines which interface is used to forward a frame based on the destination MAC address
What will a Cisco LAN switch do if it receives an incoming frame and the destination MAC address is not listed in the MAC address table?
forward the frame out all ports except the port where the frame is received
Which switch characteristic helps alleviate network congestion when a 10 Gbps port is forwarding data to a 1 Gbps port?
frame buffering
Which network device can serve as a boundary to divide a Layer 2 broadcast domain?
router
Which type of address does a switch use to build the MAC address table?
source MAC address
Which switching method makes use of the frame check sequence (FCS) value?
store-and-forward
Which option correctly describes a switching method?
store-and-forward: ensure that the frame is free of physical and data-link errors.
Which network device can be used to eliminate collisions on an Ethernet network?
switch
FCS
the extra bits and characters added to data packets for error detection and control
What does the term "port density" represent for an Ethernet switch?
the number of available ports
Which information does a switch use to keep the MAC address table information current?
the source MAC address and the incoming port
