Ethernet Basics Flashcards
What is a network technology standard based on a bud topology?
Ethernet
The ____ committee defines wired network standards that share the same basic frame type and network access method.
802.3
What 802.3 standard is the following?
10Mbps Ethernet using twisted pair cabling
802.3i
What 802.3 standard is the following?
Gigabit Ethernet over twisted pair
802.3ab
What 802.3 standard is the following?
25 Gigabit Ethernet over fiber
802.3by
All network technologies break data transmitted between computers into smaller pieces called ____.
Frames
What is the bus cable to which the computers on an Ethernet network connect?
Segment
The MAC address of the frame’s recipient is the ___.
Destination
The MAC address of the sending system is the ___.
Source
Transmission of a frame starts with a ____.
Preamble
What is a 7-byte series of alternating ones and zeros?
Preamble
What are special 48-bit(6-byte) binary addresses?
MAC addresses
What is the minimum Ethernet frame size?
64 bytes
If an Ethernet frame has fewer than 64 bytes of data to haul, the sending NIC will automatically ___ extra data.
Add
What enables Ethernet nodes to recognize when bad things happen to good data?
Frame check sequence (FCS)
What interprets the ones and zeros coming in from one port and repeats the same signal out to the other connected ports?
Repeater
____ means that the cable only carries one type of signal.
Baseband
____ means the cable carries multiple signals or channels.
Broadband
An Ethernet LAN designed to run on UTP cabling that runs at 10 Mbps and uses baseband signaling is called ___.
10BaseT
NICs that can communicate in only one direction at a time run in ____ mode.
Half-duplex
NICs that send and receive at the same time run in ____ mode.
Full-duplex
The act of installing a crimp o ton one end of a piece of UTP cable is called ___.
Crimping
The tool used to secure a crimp onto the end of a cable is a ____.
Crimper
____ means that all machines have equal access to the wire.
Multiple access
A group of nodes that have the capability of sending frames at the same time as each other, resulting in collisions is called ___.
Collision domain
What acts like a repeater to connect two networks and filters and forwards traffic between those segments based on the MAC addresses of the computers on those segments?
Bridge
What is a table of MAC addresses of each connected computer?
Source address table (SAT)
A Layer 2 multi port device that filters and forwards frames based on MAC addresses is called a ___.
Switch
What is a port on a switch that enables you to connect two switches together using a straight-through cable?
Uplink port
What are cables used to connect hosts to switches and are the connective opposite of crossover cables?
Straight-through cable
What cables reverse the sending and receiving pairs on one end of the cable?
Crossover cable
Special STP frames where switches communicate with other switches to prevent loops from happening in the first place are ___.
Bridge protocol data units (BPDUs)
A BPDU that enables switches to rework themselves around the failed interface or device.
Topology change notification(TCN)
A setting configured to enable the interface to come up right away without the normal latency introduced by STP.
PortFast
A mechanism that will move a port into a root-inconsistent state if BPDUs coming from a certain direction indicate another switch is trying to become the root bridge.
Root guard
The two categories of switch problems are:
- Obvious physical damage
2. Dead ports
Ethernet hubs take an incoming packet and ___ it out to the other connected ports.
Repeat
What is appended to the beginning of the Ethernet frame?
Preamble
What type of bus does 10BaseT use?
Star bus
What is the maximum distance that can separate a 10BaseT node from its hub?
100 meters
When used for Ethernet, unshielded twisted pair uses what type of connector?
RJ-45
What is the maximum number of nodes that can be connected to a 10BaseT hub?
1024
Which of the following is not true of crossover cables?
A. They are a type of twisted-pair cabling.
B. They reverse the sending and receiving wire pairs.
C. They are used to connect hubs.
D. Both ends of a crossover cable are wired according to the TIA/EIA 568B standard.
D.
Which of the following connectors are used by 10BaseFL cable? (Select two.)
A. SC
B. RJ-45
C. RJ-11
D. ST
A & D
Which networking devices can use the Spanning Tree Protocol(STP)?
Switches
What device directs packets based on MAC addresses?
Switch
