Notes

Question 1

What is the physical layer and data link layer’s standard for wired Ethernet networks?

Answer 1

IEEE 802.3 Standard

Question 2

What is a type of wiring in which two conductors of a single circuit are twisted together?

Answer 2

Twisted Pair Cable

Question 3

What pair of wires are twisted together, without additional shielding being added to the cable?

Answer 3

Unshielded Twisted Pair

Lightweight
Flexible
Cost-effective

Question 4

What does Shielded Twisted Pair cabling protect against?

Answer 4

Electromagnetic Interference (EMI)

STP reduces crosstalk, noise, and interference

More Expensive
Bulky
More difficult to install

Question 5

What category cabling does the following characteristic fall under?
100Mbps
100 meters maximum
100MHz frequency
100 Base-T (Fast Ethernet)

Answer 5

Cat 5

Question 6

What category cabling does the following characteristic fall under?
1000Mbps/1Gbps
100 meters maximum
100MHZ frequency

Answer 6

Cat 5e

1000Base-T

Question 7

What is the difference between Cat 5 and Cat 5e

Answer 7

Cat 5e contains more twists than Cat 5, reducing crosstalk as the data is transmitted over the cable. Also Cat 5e supports PoE.

Question 8

What category cabling does the following characteristic fall under?
1Gbps
100 meters maximum
250MHz Frequency
If 55 meters or less, supports 10Gbps

Answer 8

Cat 6

10G Base-T (Gigabit Ethernet)

Question 9

What category cabling does the following characteristic fall under?
10 Gbps
100 meters maximum
500Mhz frequency
10G Base-T

Answer 9

Cat 6a (Augmented)

Question 10

What category cabling does the following characteristic fall under?
10Gbps
100 meters maximum
600MHz frequency

Answer 10

Cat 7

10G Base-T (10-Gigabit)

Question 11

What category cabling does the following characteristic fall under?
Up to 40Gbps
30 meters maximum
2000 MHz/2 GHz frequency

Answer 11

Cat 8

Mostly used in data centers and enterprise applications

Question 12

What type of cable consists of a single copper conductor at its core, with an insulating layer and a conductive shield covering?

Answer 12

Coaxial (Coax) Cable

Question 13

What form of coaxial cable is a form of fixed assembly copper cabling used to connect switches to routers or servers?

Answer 13

Direct Attach Copper (DAC)

Question 14

What is a standardized telecommunication network interface for connecting voice and data equipment to a service provided by a local exchange carrier or long-distance carrier?

Answer 14

Registered Jack (RJ-X)

X is just a placeholder for the specific standard (e.g., RJ-11, RJ-45

Question 15

What is used with coaxial cables for various applications like high-speed Internet connections, televisions connections, and radio communications?

Answer 15

Radio Guide (RG-X)

X is just a placeholder for the specific standard (e.g.. RG-6, RG-59)

Question 16

What is a standard connector for cable television and satellite connections, and can also be used for cable Internet connections?

Answer 16

F-Type connector

Question 17

What is a standard connector for coaxial cables, and predominantly used in residential and commercial settings?

Answer 17

Radio Guide 6 (RG-6)

Question 18

What is an older specification for coaxial cables that used to be very common for television and radio signal transmission?

Answer 18

Radio Guide 59 (RG-59)

Question 19

What is a connector that is characterized by its secure bayonet locking mechanism?

Answer 19

Bayonet Neill-Concelman Connector (BNC)

Push and twist style connector
Connection professional video providers

Question 20

Endpoint devices that connect to a piece of data communications equipment or DCE (e.g., laptops, desktops, servers, and routers)

Answer 20

Data Terminal Equipment (DTE)

Question 21

In cable connections, things like switches, modems, hubs, and bridges are examples of what type of equipment?

Answer 21

Data Communications Equipment (DCE)

Question 22

What type of cable can you connect DTE to DCE/DCE to DTE?
Data Terminal Equipment to Data Communications Equipment

Answer 22

Straight-through cable

Question 23

What type of cable can you connect DTE to DTE/DCE to DCE?
Data Terminal Equipment to Data Terminal Equipment
Data Communications Equipment to Data Communications Equipment.

Answer 23

Crossover cable

Question 24

In terms of switches, what is an automated way to electronically simulate a crossover cable even if using a straight-through patch cable?

Answer 24

Medium Dependent Interface Crossover (MDIX)

auto-sensing

Question 25

What type of media is used to transmit data using light instead of electrical impulses?

Answer 25

Fiber Media Some characteristics of Fiber Media: Immunity to EMI (Electromagnetic Interference) Extended data transmission range Higher data transfer speeds

Question 26

What type of fiber media is designed for long-distance communication and features a small glass core typically around 8.3 to 10 microns in diameter?

Answer 26

Single-mode Fiber (SMF) Used in Backbone installations Large networks connections between network segments over vast areas of land.

Question 27

What type of fiber is tailored for shorter distances because it has a lager fiber core size that ranges from 50 to 100 microns?

Answer 27

Multi-mode Fiber (MMF) Due to a larger fiber core, it facilitates multiple light paths, benefiting shorter-distance data transmission.

Question 28

What fiber connector is known for its square shape and push-pull design that offers a secure and simple connection mechanism? Hint: Stick and Click

Answer 28

Subscriber Connector (stick-and-click)

Question 29

What fiber connector is distinguished by a compact size that utilizes a push-pull mechanism similar to the SC but in a much smaller form factor? Love Connector

Answer 29

Lucent Connector (Love Connector) Smaller size, better port density User pair together with send and receive sides (Love)

Question 30

What fiber connector has a round shape and a twist-lock mechanism that offers a robust and reliable connector type for use in networks? Hint: stick and twist

Answer 30

Straight Tip Connector (ST) aka Stick-and-twist

Question 31

What fiber connector features a small, rectangular design and houses both the transmit and receive fibers in a single connector?

Answer 31

Mechanical Transfer Registered Jack (MTRJ)

Question 32

What fiber connector is designed to accommodate multiple fibers in a single connector to significantly increase the capacity and flexibility of the fiber networks?

Answer 32

Multi-Fiber Push On (MPO)

Question 33

With fiber connections and data transfer, connectors have light back reflection that affects the transfer speed and distance data can transfer. What can be added to the connector to reduce back reflection?

Answer 33

Polish

Question 34

What type of polish has a slight curvature and provides the least effective reduction in back reflection?

Answer 34

Physical Contact

Question 35

What type of polish has a dome-shaped end face?

Answer 35

Ultra Physical Contact Updated and better version of Physical Contact

Question 36

What type of polish uses an angled polish to greatly reduce back reflection?

Answer 36

Angled-Physical Contact

Question 37

What is a generalized term for any device that can both transmit and receive data?

Answer 37

Transceiver Transceivers can convert or translate the data sent by one protocol to another protocol. e.g., Can convert an Ethernet signal over a copper signal to a fiber signal

Question 38

What is a family of computer networking technologies commonly used in local area networks (LANs), metropolitan area networks (MANs), and wide area networks (WANs)?

Answer 38

Ethernet

Question 39

High-speed network technology primarily used to connect computer data storage to servers in storage area networks

Answer 39

Fibre Channel (FC)

Question 40

Media converters and transceivers are considered what layer of the OSI model?

Answer 40

Layer 1 Transceivers and media converters translate signals and repeat them

Question 41

Which modules are faster between QSFP and SFP?

Answer 41

QSFP (Quad-small form factor pluggable)

Question 42

What is an organized system to connect the network's backbone in MDF to the IDF and to end user's wall jacks?

Answer 42

Cable Distribution System

Question 43

What is the location at which the Internet service provider's connection ends and the network infrastructure and cabling begin?

Answer 43

Demarcation Point

Question 44

What is the main starting point for all interior cabling that will be distributed throughout the facility?

Answer 44

Main Distribution Frame

Question 45

What is a device or unit featuring a number of jacks for the use of connecting and routing circuits for monitoring, interconnecting, and testing circuits in a convenient and flexible manner?

Answer 45

Patch Panel

Question 46

What is the strategic method of air distributions in which server racks are positioned in alternating rows with cold and hot air?

Answer 46

Port-side Exhaust and Intake Cold air intake faces one aisle and hot air exhaust faces another to prevent mixing of cold and hot air

Question 47

What is the most basic type of fire suppression system that involves using a sprinkler system and pipes that always contain water?

Answer 47

Wet Pipe System

Question 48

What helps minimize the risk of accidental releases when using a wet pipe system?

Answer 48

Pre-action System Detector and sprinkler must be tripped to activate the system.

Question 49

What utilizes a clean agent as part of its suppression system?

Answer 49

Suppression System Releases a gas to displace the oxygen in the room to suffocate the fire.

Question 50

What type of network allows devices to connect directly to each other instead of through a central access point?

Answer 50

Ad Hoc a.k.a Independent Basic Service Set (IBSS) Typically does not provide Internet access. A good way to do quick file sharing between two computers.

Question 51

What type of network connects devices through a wireless access point into a wired local area network?

Answer 51

Infrastructure Wireless Network

Question 52

What is the Basic Service Set Identifier (BSSID) set to in a wireless local area network?

Answer 52

MAC address of the wireless access point

Question 53

What creates a larger network that shares the same SSID of a wireless network to allow for seamless connectivity across a building?

Answer 53

Extended Service Set (ESS)

Question 54

What type of network connects two distinct locations over long distances using high-gain antennas?

Answer 54

Point-to-Point Similar to ad hoc, but point-to-point has a fixed location. Convenient when wired connections are not available.

Question 55

What is a standalone device that contains all of the intelligence to handle wireless networking functions independently?

Answer 55

Autonomous Access Point Usually good for SOHO networks ( Think home wifi router)

Question 56

Multiple access points connecting back to a centralized controller

Answer 56

Lightweight Access Point Simpler than autonomous, think enterprise and larger networks. Can propagate changes to all nodes using centralized controller.

Question 57

One of the most widely used frequencies for wireless networking and known for its long-range and better penetration through solid objects.

Answer 57

2.4GHz band

Question 58

What channels are available to use in the 2.4GHz channel?

Answer 58

Channels 11, 13, 14 depending on where you're located i.e. Japan, United States, Canada, etc

Question 59

What channels do not overlap in the 2.4GHz band?

Answer 59

Channels 1, 6, 11

Question 60

What 802.11 wireless standard operates in 5GHz band at the speed of up to 54Mbps with a range of around 35 meters?

Answer 60

802.11a

Question 61

What 802.11 wireless standard operates in the 2.4GHz band at the speed of up to 11Mbps with a range of about 140 meters?

Answer 61

802.11b

Question 62

What 802.11 wireless standard operates in 2.4GHz band at a speed of up to 54Mbps with a range of 140 meters?

Answer 62

802.11g

Question 63

What 802.11 wireless standard operates in 5GHz band at the speed of up to 600Mbps with a range of about 35 meters?

Answer 63

802.11n

Question 64

What 802.11 wireless standard operates in 5GHz band at speeds exceeding 6.9Gbps?

Answer 64

802.11ac utilizes MIMI (Multiple-in, Multiple-out)

Question 65

What 802.11 wireless standard operates in 2.4, 5, and 6GHz bands at speeds up to 9.6Gbps?

Answer 65

802.11ax

Question 66

What are the ONLY duel-band standards support in 802.11? Supporting 2.4GHz and 5GHz frequencies

Answer 66

Wireless n WIreless ax

Question 67

What is a security authentication where the same password or key is being used on both the wireless access point and the connecting client devices trying to gain access to the network?

Answer 67

Pre-Shared Key (PSK) Challenges with PSK: Every one uses the exact same key to access the network. If someone leaves the company or a relationship changes, the key will have to be changed and redistributed to everyone who previously had access.

Question 68

What is the original wireless security standard that is an insecure security protocol?

Answer 68

Wired Equivalent Privacy (WEP) Never to be used. Easy to be hacked by Brute Force attacks. WEP uses a 24-bit Initialization Vector (IV), a series of 1's and 0's sent in plaintext over the network, these can be captured by an attacker and reverse engineered to crack the Pre-Shared Key

Question 69

What wireless security standard uses Temporal Key Integrity Protocol (TKIP)?

Answer 69

Wi-fi Protected Access. Designed as a replacement for WEP. Uses TKIP, a new vector that is 48 bits in lengths. Easy to crack by modern standards.

Question 70

What wireless security standard was created as part of the IEEE 802.11i standard?

Answer 70

Wi-Fi Protected Access 2 (WPA2) First implemented with wireless g, then wireless n, wireless a, and wireless ac network. Uses Advanced Encryption Standard (AES), 128-bit, 192-bit, 256-bit encryption. CCMP