Certmaster Deploying Ethernet Cabling Flashcards
A systems administrator is looking at technology in the organization’s environment and finds Fast Link Pulse. What does this technology do?
A.Does not support autonegotiation
B.Supports up to 10 Mbps
C.Typically deployed on new networks
D.Sends link integrity test signals
D. Sends link integrity test signals
Fast Ethernet codes a 16-bit data packet into this signal to advertise its service capabilities. This is known as a Fast Link Pulse.
A node that does support autonegotiation can detect a node that does not support it, and it sends ordinary link integrity test signals or Normal Link Pulses.
The Fast Ethernet standard uses the same Carrier Sense Multiple Access with Collision Detection (CSMA/CD) protocol as 10BASE-T but with higher frequency signaling and improved encoding methods, raising the bit rate from 10 Mbps to 100 Mbps.
New networks would not deploy Fast Ethernet, but the sysadmin may need to maintain it in legacy installations
A company is upgrading its current network infrastructure to Gigabit Ethernet. Which of the following options concerning Gigabit Ethernet is true? (Select all that apply.)
A.Works over Cat 5e or newer
B.Max distance of 100 m for UTP cabling between node/switch port or between two ports
C.Supports rates of 1000 Mbps
D.Specified as 100BASE-T
A.Works over Cat 5e or newer
B.Max distance of 100 m for UTP cabling between node/switch port or between two ports
C.Supports rates of 1000 Mbps
Gigabit Ethernet works over Cat 5e or better. Gigabit Ethernet does not support hubs and implements using only switches.
The maximum distance of 100 meters (328 feet) applies to UTP cabling between the node and a switch port or between two switch ports.
Gigabit Ethernet builds on the standards defined for Ethernet and Fast Ethernet, implementing rates of 1000 Mbps (1 Gbps).
Over copper wire, the specification for Gigabit Ethernet is 1000BASE-T, not 100BASE-T as offered in the question. The number 1000 in 1000BASE-T correlates to the implementation rate of 1000 Mbps. Keep in mind that it can’t auto negotiate with older technologies, though.
A new network engineer is deploying an architecture using Carrier Sense Multiple Access with Collision Detection (CSMA/CD). How does the CSMA/CD protocol work?
A.Data, check network, transmit data, collision, retransmit
B.Data, transmit, collision, wait, retransmit
C.Data, check network, transmit data, collision, wait, retransmit
D.Data, check network, transmit data, collision, wait
C.Data, check network, transmit data, collision, wait, retransmit
The following steps are the correct order of a CSMA/CD protocol: Data, check network, transmit data, collision, wait, retransmit.
The steps of data, check network, transmit data, collision, and retransmit are missing the wait portion after a collision. If the protocol does not include a wait portion, then there would be many more collisions.
The steps of data, transmit, collision, wait, and retransmit are missing the check network. This is an important part of the CSMA/CD protocol.
The steps of data, check network, transmit data, collision, and wait are missing the retransmit portion. The retransmit portion is a crucial step. If it does not retransmit, it makes it pointless to do the other steps
A company calls a consultant to replace STP cabling and is looking at the varying types. Which of the following is the most challenging to install?
A.S/FTP
B.F/UTP
C.Legacy STP
D.ScTP
C. Legacy STP
Legacy shielded twisted pair (STP) cable could be complex to install, as it requires bonding each element to ground manually. Using screened or shielded cable means the consultant must also use screened/shielded connectors.
Modern shielded/foiled twisted pair (S/FTP) solutions also reduce this complexity by incorporating bonding within the design of each element.
Modern foiled/unshielded twisted pair (F/UTP) solutions (using the appropriate cable, connectors, and patch panels) reduce this complexity by incorporating bonding within the design of each element.
Screened cable has one thin outer foil shield around all pairs. Screened cable is usually designated as screened twisted pair (ScTP).
A project manager is putting together supplies for a project using fiber optic cabling. The manager is looking at the cabling core ferrule, which has the tightest connection and best return loss performance. Which of the following should the project manager use?
A. APC
B. UPC
C. PC
D. LC
A. APC
The angled faces of Angled Physical Contacts (APCs) make for an even tighter connection and better return loss performance. APCs cannot mix with PC faces or UPCs.
UltraPhysical Contact (UPC) means the cable and connector are polished to a higher standard than with PC.
Physical Contact (PC) faces of the connector and fiber tip are polished so that they curve slightly and fit together better, reducing return loss (interference caused by light reflecting back down the fiber).
The Local Connector (LC) is a small-form-factor connector with a tabbed push/pull design. LC is similar to SC, but the smaller size allows for higher port density. LC is a widely adopted form factor for Gigabit Ethernet and 10/40 GbE.
A technician who lays cabling is researching how the manufacturer constructed fiber optic cabling. Which of the following reflects signals back into the waveguide as efficiently as possible so that the light signal travels along the waveguide by multiple internal reflections?
A.Riser
B.Core
C.Buffer
D.Cladding
D. Cladding
Cladding reflects signals back into the waveguide as efficiently as possible so that the light signal travels along the waveguide by multiple internal reflections.
Riser cabling (in conduit or spaces such as lift shafts) should also conform to the appropriate fire safety standards. These are similar to the requirements for plenum spaces but not quite as strict.
Core provides the transmission path for the light signals (waveguide).
Buffer is a protective plastic coating. It may be of a tight or loose configuration, with the loose format using some form of lubricant between the strand and the sheath.
A network technician needs a cost-effective solution that can multiplex up to 16 wavelengths on an SFP/SFP+ interface. Which multiplexing technique should the network technician use?
A.CWDM
B.WDM
C.BiDi
D.DWDM
A. CWDM
Coarse Wavelength Division Multiplexing (CWDM) supports up to 16 wavelengths and typically deploys four or eight bidirectional channels over a single fiber strand.
Wavelength Division Multiplexing (WDM) is a means of using a strand to transmit or receive more than one channel at a time.
Bidirectional (BiDi) transceivers support, transmit, and receive signals over the same strand of fiber. This uses WDM to transmit the transmit (Tx) and receive (Rx) signals over slightly shifted wavelengths.
Dense Wavelength Division Multiplexing (DWDM) provisions a greater number of channels (20, 40, 80, or 160). This means that there is much less spacing between each channel and requires more precise and expensive lasers
A solutions architect is designing a cable management solution. Which of the following is the most common wiring distribution?
A.Krone
B.110 block
C.Patch panel
D.66 Block
C. Patch panel
A patch panel or patch bay is a type of distribution block with insulation-displacement connections (IDCs) on one side and pre-terminated RJ-45 modular ports on the other.
Where a 110 block uses a two-piece design and where a network administrator installs wafer blocks over the main block, the competing formats BIX and Krone use a single module.
The 110 block (developed by AT&T) is a type of distribution frame supporting 100 MHz operation (Cat 5) and better. A 110 wiring block is arranged horizontally rather than vertically.
A 66 block is an older-style distribution frame used to terminate telephone cabling and legacy data applications (pre-Cat 5). A 66 block comprises 50 rows of 4 IDC terminals.
A network cabling engineer reviews different fiber optic connector form factors. Which of the following features a push-pull mechanism that is commonly used with multimode fiber?
A.Straight Tip
B.Mechanical Transfer Registered Jack
C.Subscriber Connector
D.Local Connector
C. Subscriber Connector
The Subscriber Connector (SC) is a widespread fiber optic connector with a square body design. It features a push-pull coupling mechanism, allowing easy insertion and connector removal. This design supports single-mode and multimode versions, making the SC connector versatile for various fiber optic applications.
The Straight Tip (ST) connector is another standard fiber optic connector. Unlike some connectors, it does not feature a snap-in design. Instead, it uses a bayonet-style coupling mechanism and is primarily used with multimode fiber. This makes the ST connector suitable for applications where quick and secure connections are essential.
Mechanical Transfer Registered Jack (MT-RJ) is a duplex connector primarily used with multimode fiber. It utilizes a small form factor and uniquely combines fiber strands into a single connector. This compact design is beneficial for high-density applications where space savings are critical.
The Local Connector (LC) is a small-form-factor fiber optic connector known for its high-density application. Its tabbed push/pull design allows quick and secure connections and disconnections. LC connectors are typically used with single-mode fiber optic cables but are also compatible with multimode fiber.
A network technician is researching standards for the physical and data link layer. Which standard, developed to implement the functions of the physical and data link layers of the OSI model, is the most important?
A.802.3
B.802.1D
C.802.11
D.802.1X
A. 802.3
The most important standard developed is the Institute of Electrical and Electronics Engineers (IEEE) 802.3 Ethernet standards.
Under the original 802.1D standard, this made the network unavailable for extended periods—tens of seconds—during configuration changes.
The basis of most wireless LANs (WLANs) comes from the IEEE 802.11 standards, better known by its brand name Wi-Fi. The 802.11 standards define the physical layer media by which data encodes into a radio carrier signal.
The IEEE 802.1X port-based Network Access Control (NAC) protocol provides the means of using an Extensible Authentication Protocol (EAP) method when a device connects to an Ethernet switch port, wireless access point, or virtual private network (VPN) gateway.
