SRWE CHAPTER 2 – SWITCHING CONCEPTS | COMPLETE PRACTICE
QUESTIONS, ANSWERS & STUDY GUIDE 2026/2027
PDU - ANS ✔✔Protocol data unit- what information is called at a specific OSI model layer.
Frame - ANS ✔✔Layer 2 PDU
Layer 2 Switch - ANS ✔✔standard switch that forwards frames using MAC addresses
ingress - ANS ✔✔the source port on a switch--this MAC is captured into the MAC table
egress - ANS ✔✔the destination port on a switch uses the destination MAC in the frame to determine
egress port
MAC (CAM) Table - ANS ✔✔The table the switch creates that maps MAC addresses to switch ports
Split Horizon - ANS ✔✔network term that prohibits a frame or packet from being forwarded out the
same port it was received on originally
Learning - ANS ✔✔When the switch learns the MAC address on a source port and stores it in the MAC or
CAM table
Forwarding - ANS ✔✔When the switch forwards the frame to a specific port based on the destination
MAC
FF-FF-FF-FF-FF-FF - ANS ✔✔Broadcast MAC address. This frame will be flooded out all ports on the
switch except the source port
Flooding - ANS ✔✔Switch version of a broadcast-forwared out all ports except source port
Collision Domain - ANS ✔✔The area in a network that can be effected by collisions. Each port on a
switch or router is an isolated collision domain.
Broadcast Domain - ANS ✔✔The area of a network that can be effected by a layer 2/3 broadcast.
Routers and IP switches create broadcast domains.
Store-and-Forward - ANS ✔✔Method of switching that requires switch to read the entire frame through
the CRC. Slower but error free.
Cut Through - ANS ✔✔Method of switching that allows a switch to start forwarding frames after the
header (MAC addresses) is read. Faster but more error prone
Fragment Free - ANS ✔✔Method of switching that requires switch to read only the first 64Bytes which
statistically is where most errors occur in a frame
QUESTIONS, ANSWERS & STUDY GUIDE 2026/2027
PDU - ANS ✔✔Protocol data unit- what information is called at a specific OSI model layer.
Frame - ANS ✔✔Layer 2 PDU
Layer 2 Switch - ANS ✔✔standard switch that forwards frames using MAC addresses
ingress - ANS ✔✔the source port on a switch--this MAC is captured into the MAC table
egress - ANS ✔✔the destination port on a switch uses the destination MAC in the frame to determine
egress port
MAC (CAM) Table - ANS ✔✔The table the switch creates that maps MAC addresses to switch ports
Split Horizon - ANS ✔✔network term that prohibits a frame or packet from being forwarded out the
same port it was received on originally
Learning - ANS ✔✔When the switch learns the MAC address on a source port and stores it in the MAC or
CAM table
Forwarding - ANS ✔✔When the switch forwards the frame to a specific port based on the destination
MAC
FF-FF-FF-FF-FF-FF - ANS ✔✔Broadcast MAC address. This frame will be flooded out all ports on the
switch except the source port
Flooding - ANS ✔✔Switch version of a broadcast-forwared out all ports except source port
Collision Domain - ANS ✔✔The area in a network that can be effected by collisions. Each port on a
switch or router is an isolated collision domain.
Broadcast Domain - ANS ✔✔The area of a network that can be effected by a layer 2/3 broadcast.
Routers and IP switches create broadcast domains.
Store-and-Forward - ANS ✔✔Method of switching that requires switch to read the entire frame through
the CRC. Slower but error free.
Cut Through - ANS ✔✔Method of switching that allows a switch to start forwarding frames after the
header (MAC addresses) is read. Faster but more error prone
Fragment Free - ANS ✔✔Method of switching that requires switch to read only the first 64Bytes which
statistically is where most errors occur in a frame
