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32 Cards in this Set
- Front
- Back
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In a LAN for a small office, some user devices connect to a LAN using a cable, while others connect using wireless technology (and no cable). Which of these devices are using Ethernet?
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Only the devices that use cables are using Ethernet.
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Which Ethernet standard defines Gigabit Ethernet over UTP cabling?
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1000BASE-T
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In Fast Ethernet crossover cables, what pins transmit data and what pins receive data?
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All Pins, 1 & 2 and 3 & 6 each transmit to the opposite pair
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If these devices were connected with UTP Ethernet cables, which pair of devices would NOT require a straight-through cable?
PC and Router, PC and Switch, Hub and Switch & WAP and Switch? |
PC and Router
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What is true of the CSMA/CD algorithm?
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It allows collisions to occur, but defines how computers should notice a collision and how to recover.
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Where is the Ethernet FCS Field located in a frame and what is it used for?
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4 bytes in the trailer, error-checking
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What is a manufacturer's OUI?
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Organizationally Unique Identifier is the first 3 bytes of a device's MAC address.
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What two types of Ethernet group addresses can be used to send one frame that is delivered to multiple devices on the LAN?
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Broadcast and Multicast address
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Unshielded Twisted Pair (UTP) and Fiber-optic cabling are used for what cable standard?
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Ethernet
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What standard is Ethernet 10 Mbps cabling?
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10BASE-T
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What standard is Fast Ethernet 100 Mbps cabling?
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100BASE-T
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What standard is Gigabit Ethernet 1000 Mbps fiber-optic cabling?
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1000BASE-LX
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What standard is Gigabit Ethernet 1000 Mbps UTP cabling?
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1000BASE-T
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What standard is 10 Gig Ethernet 10 Gbps cabling?
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10GBASET
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The header and trailer of a data link protocol plus the data encapsulated inside is known as what?
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Ethernet frame
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Why are UTP cables twisted?
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To prevent crosstalk, or electromagnetic interference (EMI)
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What form of hot-swappable removable interface is used on switches to change the type of physical link on a device?
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Small form-factor pluggables (SFP)
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In Fast Ethernet straight-through cables, what pins transmit data and what pins receive data?
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Pins 1 and 2 transmit while 3 and 6 receive
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Which two of the following types of devices can also transmit on pins 3 and 6?
Hubs, NICs, Routers, Switches, or WAPs |
Hubs and Switches
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What is the only Ethernet standard that can simultaneously transmit and receive across all 8 pins, and what pin does each communicate with?
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1000BASE-T, Gigabit Ethernet, itself
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What Cisco switch feature automatically allows a device to use the "wrong" cable type?
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Auto-MDIX
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How long is the Ethernet header Preamble and what is it used for?
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Synchronization
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How long is the Ethernet header Start Frame Delimiter (SFD) and what is it used for?
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Signifies that the next byte begins the Destination MAC Address field
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How many bytes long in total are the Destination and Source MAC Address fields in the Ethernet header?
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12
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What is the Ethernet header Type field used for and how many bytes long is it?
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2 bytes and defines the type of protocol listed inside the frame, normally IPv4 or IPv6
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What is the maximum size of an L3 PDU?
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1500 bytes
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The burned-in address, or universal address, refers to what?
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MAC Address
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What is the Broadcast address and what is it used for?
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FFFF.FFFF.FFFF.FFFF, all frames sent to this address are delivered to all devices on the Ethernet LAN.
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What is a Multicast address?
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Frames sent to a multicast Ethernet address will be copied and forwarded to a subset of the devices that volunteer to receive frames sent to a specific Multicast address.
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What Ethernet protocol accounts for error recovery?
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None
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How is a half-duplex port different from a full-duplex port?
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A port that cannot send and receive data at the same time.
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What does CSMA/CD stand for?
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Carrier Sense Multiple Access with Collision Detection
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