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ICND1 > Fundamentals of LANs > Flashcards

Fundamentals of LANs Flashcards

1
Q

The term _____ refers to a family of standards that together define the physical and data link layers of the world’s most popular type of LAN.

A

Ethernet

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2
Q

The ____ ____ acts somewhat like an Ethernet switch, in that all the wireless LAN nodes communicate with the Ethernet switch by sending and receiving data with the wireless ____.

A

Access Point, AP

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3
Q

What does IEEE stand for?

A

Institute of Electrical and Electronics Engineers (IEEE)

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4
Q

The most fundamental cabling choice has to do with the materials used inside the cable for the physical transmission of bits: either _______ wires or _____ fibers.

A

copper and glass

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5
Q

The use of ________ _______ cabling saves money compared to optical fibers, with the Ethernet nodes using the wires inside the cable to send data over electrical circuits.

A

Unshielded Twisted-Pair (UTP)

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6
Q

_______ _____ cabling, the more expensive alternative, allows Ethernet nodes to send light over glass fibers in the center of the cable. Although more expensive, ______ cables typically allow longer cabling distances between nodes.

A

Fiber-Optic

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7
Q

To send data, the two devices follow some rules called an _____ _____.

A

Encoding Scheme

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8
Q

When electrical current passes over any wire, it creates _______ _______ the interferes with the electrical signals in nearby wires, including the wires in the same cable.

A

electromagnetic interference (EMI)

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9
Q

The term ______ refers to the wiring of which color wire is placed in each of the eight numbered pin positions in the RJ-45 connector.

A

pinout

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10
Q

To allow a PC NIC to communicate with a switch, the UTP cable must also use a _____ -_____ ____ _____.

A

Straight-through cable pinout

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11
Q

The _____ _____ pinout crosses the pair at the transmit pins on each device to the receive pins on the opposite device.

A

Crossover Cable

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12
Q

PC NIC transmits at pins _ and _

A

1 and 2

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13
Q

Swithces transmits at pins _ and _.

A

3 and 6

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14
Q

What pins does a PC NIC recieve on?

A

3 and 6

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15
Q

What pins does a Switch recieve on?

A

1 and 2

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16
Q

What method do you use if the endpoints transmit on the same pin pair?

A

Crossover Cable

17
Q

What method do you use if the endpoints transmit on different pin pairs.

A

Straight-through Cable

18
Q

What devices transmits on Pins 1 & 2

A

PC NICs, Routers, and Wireless Access points (Ethernet Interface)

19
Q

What devices transmits on Pins 3 & 6.

A

Hubs and Swithces

20
Q

The term _____ is simply a formal way to refer to the fact that the address represents one interface to the Ethernet LAN.

A

Unicast

21
Q

Logic in which a port sends data only when it is not also receiving data; in other words, it cannot send and receive at the same time.

A

Half-duplex

22
Q

The absence of the half-duplex restriction

A

Full-duplex

23
Q

In the LAN for a small office, some user devices connect to the LAN using a cable, while others connect using wireless technology (and no cable). Which of the following is true regarding the use of Ethernet in this LAN?

a. Only the devices that use cables are using Ethernet.
b. Only the devices that use wireless are using Ethernet
c. Both the devices using cables and those using wireless are using Ethernet
d. None of the devices are using Ethernet

A

a. Only the devices that use cables are using Ethernet.

24
Q

Which of the following Ethernet standards defines Gigabit Ethernet over UTP cabling?

a. 10GBASE-T
b. 100BASE-T
c. 1000BASE-T
d. none of the other answers is correct

A

c. 1000BASE-T

25
Q

Which of the following is true about Ethernet crossover cables for Fast Ethernet?

a. Pins 1 and 2 are reversed on the other end of the cable
b. Pins 1 and 2 on one end of the cable connect to pins 3 and 6 on the other end of the cable.
c. Pins 1 and 2 on one end of the cable connect to pins 3 and 4 on the other end of the cable.
d. The cable can be up to 1000 meters long to cross over between buildings.
e. None of the other answers is correct

A

b. Pins 1 and 2 on one end of the cable connect to pins 3 and 6 on the other end of the cable.

26
Q

Each answer lists two types of devices used in a 100BASE-T network. If these devices were connected with UTP Ethernet cables, which pairs of devices would require a straight-through cable? (choose three answers)

a. PC & router
b. PC & switch
c. Hub & Switch
d. Router & Hub
e. Wireless access point (Ethernet port) and switch

A

b. PC & switch
d. Router & Hub
e. Wireless access point (Ethernet port) and switch

27
Q

Which of the following is true about the CSMA/CD algorithm?

a. The algorithm never allows collisions to occur
b. Collisions can happen, but the algorithm defines how the computers should notice a collision and how to recover.
c. The algorithm works with only two devices on the same Ethernet
d. None of the other answers are correct

A

b. Collisions can happen, but the algorithm defines how the computers should notice a collision and how to recover.

28
Q

Which of the following is true about the Ethernet FCS field?

a. Ethernet uses FCS for error recovery
b. It is 2 bytes long
c. It resides in the Ethernet trailer, not the Ethernet header.
d. It is used for encryption

A

c. It resides in the Ethernet trailer, not the Ethernet header.

29
Q

Which of the following are true about the format of Ethernet addresses? (Choose three answers)

a. Each manufacturer puts a unique OUI code into the first 2 bytes of the address.
b. Each manufacturer puts a unique OUI code into the first 3 bytes of the address
c. Each manufacturer puts a unique OUI code into the first half of the address.
d. The part of the address that holds this manufacturer’s code is called the MAC.
e. The part of the address that holds this manufacturer’s code is called the OUI.
f. The part of the address that holds this manufacturer’s code has no specific name.

A

b. Each manufacturer puts a unique OUI code into the first 3 bytes of the address
c. Each manufacturer puts a unique OUI code into the first half of the address.
e. The part of the address that holds this manufacturer’s code is called the OUI.

30
Q

Which of the following terms describe Ethernet addresses that can be used to send one frame that is delivered to multiple devices on the LAN? (Choose two)

a. Burned-in address
b. Unicast address
c. Broadcast address
d. Multicast address

A

c. Broadcast address

d. Multicast address

ICND1 (9 decks)

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