CH4 - Course Quiz Flashcards
What wavelength is used on 10GBase-SR Network?
1300nm
1310nm
1500nm
850nm
850nm
The older ______ connector left a little gap between the connection points due to imperfections in the glass?
angled physical contact (APC)
flat-surface connector
physical contact (PC)
ultra-physical contact (UPC)
flat-surface connector
The “R” in the standard 10GBase-SR stands for which type of singnalling?
Radio
SONET/WAN
Wireless
LAN
LAN
The ______ version of Gigabit Ethernet, published under the 802.3z standard, is divided into a series of standards, with names such as 1000Base-SX and 1000Base-LX?
1000Base-LX
1000Base-X
1000Base-T
1000Base-SX
1000Base-X
Which wavelength is used on 10GBase-LW Fiber-Optic cabling?
1310nm
1550nm
850nm
1300nm
1310nm
The vast majority of Network rollouts in offices use 1000Base-T connections, or _______, as you’ll hear them called?
drops
links
linkages
points
drops
The specs for 100Base-T calls for UTP cabling using _______ or better rated cabling?
Cat 2
Cat 5
Cat 3
Cat 1
Cat 5
Which term refers to 100-Mbps standards, even though there are now much faster versions of Ethernet available?
full-duplex Ethernet
switched Ethernet
Fast Ethernet
Gigabit Ethernet
Fast Ethernet
All NICs today run at half-duplex?
True
False
False
Manufacturers have accomodated the need for Switches to connect to a variety of 10GbE Connector types by devising which concept?
Multisource Agreements (MSAs)
SC Connectors
Twinaxial Cable
ST Connectors
Multisource Agreements (MSAs)
1000Base-LX connectors look similar to 1000Base-SX connectors?
True
False
True
With _________, you can get multiple signals to flow over the same wire at the same time, modulating to higher frequencies?
core-band
baseband
flow-band
broadband
broadband
With full-duplex, a NIC can send and receive data at the same time?
True
False
True
All modern NICs are multispeed and auto-sensing?
True
False
True
The Ethernet community would like to position 1000Base-SX as the Ethernet backbone of the future?
True
False
False
Describe the 3 key reasons UTP Cabling cannot meet the needs of every organization?
Distance - Limited to 100 meters.
Interference - Poor choice for Networks with high levels of electromagnetic interference.
Security - Easy to tap, making it inappropriate choice for high-security environments.
Compare 10GBase-T to earlier, slower versions of UTP Ethernet?
Looks and works exactly like the slower versions of UTP Ethernet
Downside of 10GBase-T running on Cat 6 has a max cable length of 55 meters.
Cat 6a enables 10GBase-T to run at the standard distance of 100 meters.
What does it mean to be a half-duplex mode NIC?
The NIC is capable of only Sending OR Receiving data at a time.
Even though Fast Ethernet is no longer implemented for new installation, explains why you may still see it in operation today?
It’s still solid for Simple Networks where you share small amounts of data, like documents or spreadsheets.
Plenty of LANs around teh world continue to use 100 Mbps.
Also Network-Connected devices such as Printers, function just fine on Fast Ethernet as well.
Describe the problems that begin to surface with ST and SC connectors around the time that Gigabit Ethernet first started to appear?
First - ST Connectors are relatively large, twist-on connectors, requiring the installer to twist the cable when inserting or removing it.
Twisted is not a popular action with Fiber-Optic cables, as the delicate fibers may fracture.
Also, big-fingered techs had issues with ST connectors if the connectors are too closerly packed, they can’t get their fingers around them.
SC connectors snap in and out, making them much more popular than STs.
SC Connectors are also large, however, and the folks who make Fiber networking equipment wanted to pack more connectors into their boxes.
The vast majority of Network rollouts in offices use ________ connections (or drops, as you’ll hear them called)?
1000Base-T
The version of GbE published under the IEEE _______ standard is known as 1000Base-X, and is divided into a series of stnadards, with names such as 1000Base-SX and 1000Base-LX?
802.3z
The IEEE has approved 2 different versions of Gigabit Ethernet: 1000Base-T and __________?
1000Base-X
Early 100Base-T NICs, just like 10Base-T NICs, could send and receive data, but not at the same time is a feature called _________?
half-duplex
A 100Base-FX Network has a max cable run distance of _________ kilometers?
2
In 100Base-T, what is the max number of Nodes Per Hub/Switch?
2048
256
48
1024
1024
Full-duplex Ethernet directly increases Network speed?
True
False
False
Which modular transceivers have replaced gigabit interface converters (GBICs) as the modular transciever of choice?
small form-factor pluggable (SFP)
angled physical contact (APC)
flat-surface
ultra-phyiscal contact (UPC)
small form-factor pluggable (SFP)
Which version of Gigabit Ethernet is published under the 802.3ab Standard?
1000Base-T
1000Base-SX
1000Base-LX
1000Base-CX
1000Base-T
What is the most common connector used in 1000Base-SX Network?
LC
SC
RJ-45
RJ-11
LC
Which wavelength is used by 1000Base-LX fiber-optic cabling?
5km
850nm
1300nm
100m
1300nm
A connection created using angled physical contact (APC) connectors degrades from multiple insertions?
True
False
False
The NIC and the attached ______ determine full-or half-duplex during the auto-negotiation process?
Switch
Hub
Amplifier
Repeater
Switch
The Mechanical Transfer Registered Jack (MT-RJ) is a type of small form factor (SFF) Connector?
True
False
True
Of all the Gigabit Ethernet IEEE Standards detailed in the chapter, which one maintains a signal over the greatest distance?
1000Base-T
1000Base-SX
1000Base-LX
1000Base-CX
1000Base-LX
What type of fiber-optic cabling and connectors does a 100Base-FX Network use?
multimode with ST or SC connectors
multimode with various connectors
single-mode with various connectors
twinaxial with twinaxial connectors
multimode with ST or SC connectors
What is the least expensive and most popular 10 GbE media type?
10GBase-LR
10GBase-LW
10GBase-SR
10GBase-SW
10GBase-LR
Describe the characteristics of 10GBase-EW standard, including Fiber Type, Wavelength, Physical Layer Signalling, and Max Signal Length?
Fiber Type = Single-Mode
Wavelength = 1550nm
Physical Layer Signaling = SONET/WAN
Max Signal Length = 40km
Discuss what emerged when the time came to come up with a new standard to replace 10Base-T?
Network hardware makers forwarded a large number of potential standards, all focused on the prize of leading the new Ethernet standard. As a result, two twisted-pair Ethernet standards appeared: 100BASE-T4 and 100BASE-TX. 100BASE-T4 used Cat 3 cable, whereas 100BASE-TX used Cat 5 and Cat 5e. By the late 1990s, 100BASE-TX became the dominant 100-megabit Ethernet standard. 100BASE-T4 disappeared from the market and today has been forgotten. As a result, we never say 100BASE-TX, simply choosing to use the term 100BASE-T.
How could one distinguish a 10Base-T NIC from a 100Base-T NIC?
You had to look for something on the Card to tell you its speed.
Some NICs have extra Link Lights to show the Speed.
You can also always install the Card and see what the OS or other identifying tools says it sees.
Describe the Cabling used for 1000Base-SX Standard. Include the Cable Length Limits, Signaling, and Wavelength?
Cable Length = 220 to 500m
Signaling = LED Multimode
Wavelength = 850nm
The Gigabit Ethernet standard 1000Base-X is divided into a series of standards, with names such as _______ and ________?
1000Base-SX
1000Base-LX
Most 10 GbE BiDi Transceivers use SFP+ connectors; however, 40 GbE BiDi Transceivers use ________ optics?
QSFP (Quad Small Form-Factor Pluggable)
1000Base-SX uses __________ to transmit light on the fiber-optic cable?
LED (Light Emitting Diode)
Which 10 GbE standard features a Multimode Fiber Type?
10GBase-LW
10GBase-ER
1GBase-LR
10GBase-SR
10GBase-SR
The different colors of Laser Signals transmitted over Fiber-Optic cables feature different ________?
speeds
noise levels
wavelengths
temperatures
wavelengths
What is the max cable length of a segment of a 1000Base-T Network?
2000m
400m
200m
100m
100m
Which very high-speed Fiber Network was already in place and being used for Wide Area Networking (WAN) Transmissions before the IEEE developed 10GbE Ethernet Standards?
100Base-T
SONET
the Internet
10GBase-T
SONET
Twisting fiber-optic cables when inserting or removing them is a cable-safe and popular action?
True
False
False
Discuss the Factors defined in the 10 GbE Standards without giving specific names of the standards and their parameters?
The Type of Fiber Used, the Wavelength of the Laser or Lasers, the Physical Layer Signaling Type, and Max Signal Distance.
Describe what all types of 10 GbE equipment have in common, and how they may physically differ?
All types of 10 GbE send and receive the same signal, only the physical medium is different.
Briefly explain how one can extend 1000Base-LX from a max distance of 5km to 70km?
By using Special Repeaters
Explain why Fiber equipment may have different connectors - even nonstandard ones?
Because the fiber industry has no standard for connectors beyond ST and SC.
With many Gigabit Ethernet Switches and other hardware, you can simply pull out a transceiver - the connecting module, commonly referred to as an _________ - that supports one flavor of Gigabit Ethernet and plug in another?
optic
_______ uses four-pair UTP or STP cabling to achieve Gigabit performance?
1000Base-T
You can use dedicated ________ to connect any type of Ethernet cabling together?
media converters
