5.2 Networking Hardware

Question 1

Network Interface Cards

Answer 1

• Ethernet
• Fiber
• Wireless
• MAC address

Question 2

Ethernet

Answer 2

Ethernet communications are established by either electrical signaling over copper twisted pair cable or pulses of light transmitted over fiber optic cable

Question 3

MAC Stands For?

Answer 3

media access control

Question 4

How many digits/bytes does a MAC address have?

Answer 4

48 binary digits, making it six bytes in size

Question 5

A MAC address is typically represented

Answer 5

as 12 digits of hexadecimal.

Question 6

MAC address =?

Answer 6

hardware address

Question 7

MAC address

Answer 7

48-Bit, hexadecimal digits
* 24-bit OUI
* 24-bit NIC specific

Question 8

Hexadecimal

Answer 8

Hexadecimal is a numbering system often used to represent network addresses of different types.

Question 9

A hexadecimal digit can be

Answer 9

one of sixteen values: 0–9 and then A, B, C, D, E, F. Each hexadecimal digit represents half a byte (or four bits aka a nibble).

Question 10

First 24

Answer 10

The first 24 bits are known as the Organizationally Unique Identifier (OUI). This identifies the manufacturer of the NIC.

Question 11

OUI Stands for

Answer 11

Organizationally Unique Identifier

Question 12

OUI def

Answer 12

This identifies the manufacturer of the NIC.

Question 13

Last 24

Answer 13

The last 24 bits are known as the Network Interface Controller (NIC) Specific. This is a unique identifier for each NIC

Question 14

NIC stand for

Answer 14

Network Interface Controller

Question 15

NIC Def

Answer 15

This is a unique identifier for each NIC

Question 16

Patch Panels

Answer 16

• Type of distribution frame used with twisted pair cabling with IDCs to terminate fixed cabling on one side and modular jacks to make cross-connections to other equipment on the other. Also called a patch bay.
• Connection point from wall jacks (Keystone Jacks) to switch
• Punch down tool used for rear connections
• RJ-45 port used to connect to
  switch port on the front

Question 17

Switches

Answer 17

• Connection between end point nodes
• CAM table
• Collision domain vs. broadcast domain

Question 18

Unmanaged Switch

Answer 18

• plug and play
• An unmanaged switch performs its function without requiring any sort of configuration.

Question 19

Managed Switch

Answer 19

• Management Interface for configuration
• Ethernet switch that is configurable via a command-line interface or SDN controller.

Question 20

How many ports in unmagaged switch

Answer 20

• Common unmanaged switches will have four or eight ports, as they are typically used in small networks.
• There is an unmanaged four-port switch embedded in most of the SOHO router/modems supplied by Internet Service Providers (ISPs) to connect to their networks.

Question 21

How many ports in mangaged switch

Answer 21

• A typical workgroup switch will come with 24 or 48 access ports for client PCs, servers, and printers. These switches have uplink ports allowing them to be connected to other switches.

Question 22

Power over Ethernet

Answer 22

• Specification allowing power to be supplied via switch ports and ordinary data cabling to devices such as VoIP handsets and wireless access points. Devices can draw up to about 13 W (or 25 W for PoE+).
• is a means of supplying electrical power from a switch port over ordinary data cabling to a powered device (PD), such as a voice over IP (VoIP) handset, camera, or wireless access point. PoE is defined in several IEEE standards
• IEEE standards
• PoE-enabled switch
• PoE injector

Question 23

802.3af (Type 1 PoE or 2-pair PoE)

Answer 23

allows powered devices to draw up to about 13 W. Power is supplied as 350mA@48V and limited to 15.4 W, but the voltage drop over the maximum 100m (328 feet) of cable results in usable power of around 13 W. Basic devices such as a VoIP handset, basic wireless access points, and basic security cameras will use this standard.

Question 24

802.3at (PoE+ or Type 2 PoE)

Answer 24

allows powered devices to draw up to about 25 W, with a maximum current of 600 mA. Devices that require more power, such as advanced wireless access points, pan-tilt-zoom security cameras, and video IP phones, will use this standard.

Question 25

802.3bt (PoE++, Type 3 and Type 4 PoE, 4PPoE)

Answer 25

supplies up to about 51 W (Type 3) or 73 W (Type 4) usable power. Devices such as LED lighting, digital signage, point-of-sale systems, and other high-power devices will use this standard.

Question 26

PoE-enabled switch

Answer 26

is referred to as endspan power sourcing equipment (PSE). When a device is connected to a port on a PoE switch, the switch goes through a detection phase to determine whether the device is PoE enabled. If so, it determines the device's power consumption and sets an appropriate supply voltage level. If not, it does not supply power over the port and, therefore, does not damage non-PoE devices.

Question 27

PoE Injector

Answer 27

If the switch does not support PoE, a device called a "power injector" (or "midspan") can be used. One port on the injector is connected to the switch port. The other port is connected to the device. The overall cable length cannot exceed 100m.

Question 28

injector

Answer 28

A device that can supply Power over Ethernet (PoE) if the Ethernet switch ports do not support it.