Infrastructure Flashcards
You are creating the specifications for a network cabling install. The cabling needs to sustain speeds of 1 Gbps, and the cabling will be installed in the welding area of your plant. What type of cabling should you specify?
Category 5 cable
UTP cable
STP cable
STP cable
The cabling type needs to be STP cable, because there will be a high amount of EMI in the plant area with the welding equipment
You are creating the specification for the cabling install between two buildings on your local network campus. You estimate that the buildings will be 2500 feet apart, and you need to supply 40 Gbps network speeds between them. Which cabling type should you specify?
Category 7 cable
Multimode fiber-optic cable
Single-mode fiber-optic cable
Single-mode fiber-optic cable
Although the distance of the cable is below 3000 feet, which would normally necessitate MMF cable, the speed is 40 Gbps and is over the 10 Gbps that MMF cable can provide. So SMF is your only option in this scenario, dictated by speed
Your building is being renovated, and during the renovation much of the network cabling in the ceiling must be replaced. As the senior network administrator, you are responsible for deciding the cabling to be used. Which network cabling type should you recommend for the new network cabling?
Stranded PVC cabling
Stranded plenum cabling
Solid-core plenum cabling
Solid-core plenum cabling
A renovation is no different than a brand-new building, and fire and electrical code must be followed. You must use plenum-rated cable because it is in a ceiling, which could provide ventilation. Solid-core wiring should be used because it will be a permanent installation
You need to decide which cable connectors to order for a coaxial cable installation at a hotel you administer. The cable installation will provide guests with Internet access over MoCA set-top boxes. Which cable connectors will most likely be used?
F-connectors
BNC connectors
RJ-11 connectors
F-connectors
The F-connector is used for MoCA set-top boxes and broadband cable boxes. It is the most common cable connector for coaxial cable installations with set-top boxes
Which fiber-optic cable connector has a similar locking mechanism as a BNC connector?
LC connector
ST connector
SC connector
ST connector
The straight tip (ST) connector has a similar locking mechanism as the BNC connector. After aligning the fiber-optic tip, a half-turn provides a locking mechanism to engage to secure the cable
You are creating a specification for the equipment to be installed between two buildings that requires 400 Gbps network speeds. Which type of transceiver should you require in your search for the network equipment to support?
SFP transceivers
SFP+ transceivers
QSFP transceivers
SFP+ transceivers
The SFP+ transceivers can deliver up to 400 Gbps over single-mode fiber-optic cable. The network equipment must be compatible with SFP+ transceivers and be able to deliver the 400 Gbps at the SFP+ port
Your company requires fault-tolerant high-speed network connectivity between two locations. You are working with a dark fiber-optic provider and want to minimize monthly reoccurring costs. What should be ordered to minimize reoccurring costs and maintain the requirements?
Two strands of fiber-optic cable and duplex transceivers
Two strands of fiber-optic cable and bidirectional transceivers
Four strands of fiber-optic cable and duplex transceivers
Two strands of fiber-optic cable and bidirectional transceivers
To minimize the monthly reoccurring costs, two strands of fiber-optic should be purchased. The transceivers used on the two strands should be bidirectional transceivers. This will allow each strand to work independently of each other in the event of a failure on one strand. Although four strands with duplex transceivers would achieve fault-tolerance, the monthly reoccurring costs would be double
Which termination point allows for easier diagnostics of Ethernet wiring problems to users’ computers in your network?
66-block
110-block
Patch panels
Patch panels
Patch panels are commonly used as diagnostic points for wired Ethernet wiring problems. The patch panel allows for easier diagnostic of these types of problems
Your company is creating a new office and you want to future-proof the Ethernet network for 10 Gbps speeds. Which type of cabling should you recommend be installed?
Category 5e cabling
Category 6 cabling
Category 6a cabling
Category 6a cabling
Category 6a cabling should be specified for the installation. It will allow 10 Gbps speeds at distances of 100 meters. Category 6 cabling will deliver speeds of 10 Gbps but only at distances of 55 meters
Currently your network is running 100 Mbps switching equipment. You need to raise the bandwidth to the desktops to 1 Gbps. You examine the existing cabling and find that Category 5e cable has been installed. What will you recommend to achieve the goal while keeping costs to a minimum?
Replace only the switching equipment.
Replace both the switching equipment and replace the wiring with Category 6a cabling.
Replace both the switching equipment and replace the wiring with Category 7 cabling.
Replace only the switching equipment.
Category 5e network cable will allow for 1 Gbps speeds at a maximum distance of 100 meters. The only component required to achieve 1 Gbps to the desktops is the switching equipment
Which cable specification is not recognized by the TIA/EIA standards?
Category 3 cable
Category 6 cable
Category 7 cable
Category 7 cable
Category 7 cable is not recognized by the TIA/EIA standards. Although it is being sold at the next-generation of TIA/EIA standards, it has not been officially published as a specification
In which scenarios must you use a crossover Ethernet cable?
Connecting a router to a switch
Connecting a switch to a switch without auto-MDIX
Connecting a switch to a computer
Connecting a switch to a switch without auto-MDIX
A crossover cable must be used when connecting a switch to a switch when the auto MDI-X mechanism is not available
Which IEEE Ethernet specification defines a maximum distance of 550 meters at 1 Gbps?
1000BaseT
1000BaseLX
1000BaseSX
1000BaseSX
The 1000BaseSX specification defines a maximum distance of 550 meters at 1 Gbps when using 50 micron cable. The SX and LX designations are often used as a mnemonic for short-haul and long-haul, respectively
Which devices provide the lowest latency and highest bandwidth for connectivity?
Hubs
Switches
Bridges
Switches
Switches provide the lowest latency with the use of application-specific integrated circuits (ASICs). Hubs are multiport repeaters and diminish usable bandwidth. Bridges are software-based switches and provide higher latency than switches
Which networking component allows you to detect and prevent malicious network activity?
Firewall
IDS/IPS
Proxy server
IDS/IPS
Intrusion detection systems and intrusion prevention systems (IDSs/IPSs) offer detection and prevention of network intrusion of malicious activity.
Which network component will allow a VPN concentrator to authenticate a remote VPN user?
Content filter
NGFW/layer 7 firewall
RADIUS server
RADIUS server
RADIUS servers provide authentication, authorization, and accounting for VPN concentrators. They can be coupled to Active Directory or LDAP directory services for user authentication
You currently have a PBX that does not support VoIP. Which network component can you use to provide VoIP support to this PBX?
VoIP PBX
VoIP gateway
SIP server
VoIP gateway
A VoIP gateway can convert a SIP provider’s VoIP services to a T1 or ISDN line that the legacy PBX expects. This allows VoIP services to be used with the legacy PBX
Which type of hypervisor allows a virtual machine to directly share the resources of RAM and CPU without the help of the operating system?
Type 1 hypervisor
Type 2 hypervisor
Hybrid hypervisor
Type 1 hypervisor
A type 1 hypervisor allows virtual machines to directly access the resources of the CPU and RAM of the host. Hybrid hypervisors do a similar task, but they require the host operating system for management
Which storage technology uses dedicated switches to create a storage network for block-level storage?
iSCSI
FCoE
Fibre Channel
Fibre Channel
Fibre Channel uses dedicated Fibre Channel switches to create a storage area network (SAN) for block-level access of an FC storage LUN
You currently use an iSCSI storage unit for your host storage. Recently you suffered a performance problem and found that the CPU utilization on the hosts is higher than expected. What can you do to reduce the CPU utilization while keeping costs low?
Implement FCoE as the host access protocol.
Replace the iSCSI storage unit with InfiniBand.
Implement jumbo frames for the iSCSI unit.
Implement jumbo frames for the iSCSI unit.
When jumbo frames are implemented, it changes the MTU of Ethernet from 1500 bytes to 9000 bytes. This reduces the fragmentation of iSCSI layer 3 packets and reduces the CPU utilization on both the host and iSCSI unit
Which technology uses one channel of 24 channels for call setup?
ISDN
T1 leased line
T3 leased line
ISDN
An ISDN primary rate leased line uses one of the 24 channels for call setup. The remaining 23 channels are used to place the phone calls
You need to provide network connectivity to a remote site on the side of a mountainous terrain. Which technology should you investigate that would cost the least on the initial buildout?
Metropolitan Ethernet
WiMAX
DSL
WiMAX
WiMAX is a wireless technology sometimes called last mile service. It is mainly used when the cost of the buildout is too expensive due to geographical terrain
You maintain several branch offices that use VPN connectivity to communicate with the main office. You notice that your bandwidth usage has increased at the main office as workers access resources at other branch offices. Which technology might help you lower bandwidth usage at the main office?
Frame Relay
MPLS
DMVPN
DMVPN
Although any of these technologies could potentially help reduce bandwidth usage at the main office, you already have a VPN infrastructure in place. DMVPN would allow you to create a mesh VPN and allow branch offices to communicate directly with each other without using bandwidth from the main office
Your company is getting a new DSL Internet circuit. Which protocol will you need to configure to allow it to work?
PPP
PPPoE
DSLAM
PPPoE
DSL providers mainly use the PPPoE protocol to authenticate subscribers and provide DSL modem configuration
You are having problems with your ISDN circuit. When the ISDN provider dispatches a technician to your location, where will they perform diagnostic tests when they are on site?
Loopback
Demarcation point
CSU/DSU
Demarcation point
When the technician is dispatched to your location for diagnostic troubleshooting, they will troubleshoot from the demarcation point back to the provider
