Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
97 Cards in this Set
- Front
- Back
|
What does link aggregation do? |
It combines multiple physical connections into a single logical connection, thereby alleviating congestion on the physical connections. |
|
|
What is the purpose of the 802.1q standard? |
VLAN trunking |
|
|
Which special type of cable can you use to check communications between two workstations? |
a crossover cable |
|
|
What specific actions do you perform during the third step in the Network+ troubleshooting strategy? |
When testing a theory to determine cause: 1. If theory is confirmed, determine next steps to resolve problem 2. If theory is not confirmed, re-establish new theory or escalate |
|
|
What is a newer alternative to LWAPP? |
Control and Provisioning of Wireless Access Points (CAPWAP) |
|
|
What should you use to determine if an SFP or GBIC have failed? |
an LC loopback tester |
|
|
What is a straight-through cable? |
a cable in which each pin connects to the same pin on the opposite side |
|
|
How could you deploy two wireless access points in close proximity? |
Either configure them to use different channels or decrease their signal strength so that the area of coverage does not overlap. |
|
|
What does the acronym GBIC denote? |
Gigabit Interface Converter |
|
|
What is refraction? |
the bending of waves as they pass from one medium to another, due to a change in their speed |
|
|
Which tool is used to attach a connector to the end of a cable by means of pressing metal contacts into the inner conductors? |
a wire crimper |
|
|
What is the UNIX/Linux equivalent to the tracert command? |
traceroute |
|
|
Which Linux utility assigns an IP address to a network interface? |
ifconfig |
|
|
Which device is used to determine where a break has occurred in a network cable? |
a time domain reflectometer (TDR) |
|
|
What specific actions do you perform during the second step in the Network+ troubleshooting strategy? |
To establish a theory of probable cause, you should: 1. Question the obvious 2. Consider multiple approaches A. Top-to-bottom/bottom-to-top OSI model B. Divide and conquer |
|
|
What device or tool is used to test telephone lines? |
a butt set |
|
|
Which utility displays the following line as output? Reply from 210.98.102.3: bytes=32 time<10ms TTL=128 |
ping |
|
|
Which type of network interference is caused by fluorescent lighting? |
electromagnetic interference (EMI) |
|
|
What device or tool can be used to determine the length of the cables used on a fiber optic network? |
an optical time domain reflectometer (OTDR) |
|
|
Which TCP/IP utility do you use to display the current IP configuration of a Windows 2000 Professional, or later, computer? |
ipconfig |
|
|
In addition to entering ping 127.0.0.1, which other command can you use to test the local TCP/IP interface? |
ping localhost |
|
|
What does the acronym RFI denote? |
radio frequency interference |
|
|
What is LWAPP? |
a protocol that allows a wireless LAN controller (WAC) to manage and control multiple wireless access points |
|
|
When does a switching loop occur? |
when there is more than one Layer 2 path between two endpoints |
|
|
What measures interference between two pairs of a cable measured at the other end of the cable with respect to the interfering transmitter? |
Far-end crosstalk (FEXT) |
|
|
Which TCP/IP utility do you use when you want to determine the route a packet takes to reach a remote system? |
tracert |
|
|
What is another term used for attenuation? |
decibel (Db) loss |
|
|
Which utility allows you to query a name server to find out which IP address corresponds to a particular domain name? |
nslookup |
|
|
Which tool do you use to check the physical condition of a cable to determine if there are excess collisions and congestion errors on a network? |
an advanced cable tester |
|
|
What condition is indicated by a small amber-colored LED that stays continuously lit on a hub? |
excessive network collisions |
|
|
Which tool will help you input a test signal that can be traced through the cable? |
a tone generator |
|
|
What two possible situations does an unsuccessful ping of 127.0.0.1 indicate? |
that TCP/IP is not properly installed on the local device, or that the local interface is not functioning |
|
|
What does the show mac address-table command do? |
displays information about the MAC address table on a Cisco device |
|
|
What is harmonic distortion? |
the distortion of a wave by unwanted multiples of an original frequency, causing interruptions to the way the wave form behaves in electrical circuits, or sounds |
|
|
Which TCP/IP utility is used to test a connection from a workstation to a server? |
ping |
|
|
Which two methods could you use to fix a black hole? |
1) Configure the black-hole routers to send ICMP Type 3 Code 4 messages
or 2) Set the MTU of the black-hole router interface to be the largest size that the black-hole router can handle |
|
|
What does medium dependent interface crossover (MDIX) allow switches to do? |
It allows a switch port to properly configure its leads as transmit (Tx) or receive (Rx) leads. |
|
|
What is a crossover cable? |
a cable in which some of the internal wires cross over each other by switching the orange-white and green-white wires, and then the orange and green wires |
|
|
What occurs when there is a break or improper termination in the cabling that prevents current from flowing through a circuit? |
an open or a short |
|
|
How does half-duplex mode affect traffic? |
Devices can only transmit or receive at any one time. |
|
|
What should you do to automatically propagate VLAN information to all switches on the LAN? |
Use VLAN Trunking Protocol (VTP). |
|
|
What happens when you use an active-active NIC team? |
Both NICs work together to manage network traffic |
|
|
What is a small form-factor pluggable (SFP)? |
a transceiver used in network devices, including routers and switches |
|
|
What is the term used to describe the loss of signal strength as data travels over a network cable? |
attenuation |
|
|
What is the term for a loss of signal strength as data travels over the network medium (cable)? |
attenuation |
|
|
Which utility do you use to display a list of local IP addresses resolved to physical addresses on a Microsoft Windows NT or later network? |
the arp utility |
|
|
Which TCP/IP utility displays the current protocol statistics and port connections? |
netstat |
|
|
Which type of antenna only transmits in a single direction? |
unidirectional antenna |
|
|
Which utility is the UNIX equivalent to the nslookup utility? |
the dig utility |
|
|
What happens when you use an active-passive NIC team? |
One NIC is the primary NIC. The other NIC is only brought over in a failover situation when the primary NIC is down. |
|
|
How does wireless jamming work? |
by denying service to authorized users as legitimate traffic is jammed by the overwhelming frequencies of illegitimate traffic |
|
|
Which special IP address is reserved for loopback? |
127.0.0.1 |
|
|
What specific actions do you perform during the first step in the Network+ troubleshooting strategy? |
To identify the problem, you should: 1. Gather information 2. Duplicate the problem, if possible 3. Question users 4. Identify symptoms 5. Determine if anything has changed 6.Approach multiple problems individually |
|
|
Which type of antenna transmits in a defined radius from the antenna placement? |
omnidirectional antenna |
|
|
What device is used to trace a cable by means of connecting an alligator clip to one end and touching the other end with a probe? |
a tone generator |
|
|
What tool is used to locate the signal generated by a tone generator at the other end of the cable? |
a tone locator |
|
|
What does the acronym EMI denote? |
electromagnetic interference |
|
|
What tool should you use to attach a connector to each end of a cable and create a patch cable? |
a wire crimper |
|
|
What does a WiFi analyzer do? |
analyzes the signal strength of your wireless access points |
|
|
What is another term for optical tester? |
light meter |
|
|
Which TCP/IP utility displays protocol statistics and connections using NetBIOS? |
nbtstat |
|
|
What is multicast communications? |
when a single device communicates with multiple hosts |
|
|
What does the acronym CSU/DSU denote? |
Channel Service Unit/ Data Service Unit |
|
|
What is intermodulation distortion? |
when two different frequencies are simultaneously passed through an amplifier |
|
|
What does the acronym MTU denote? |
Maximum Transmission Unit |
|
|
What device or tool is used to identify a single cable on the network? |
a toner probe |
|
|
What tool checks for open circuits and short circuits on your network and typically includes an electric current source, a volt meter, and an interface for connecting to the cable? |
a cable tester |
|
|
What do you use to connect two workstations directly, bypassing the hub, to test communications? |
a crossover cable |
|
|
What are the seven steps to the troubleshooting strategy as detailed in the Network+ exam guide from CompTIA? |
1.Identify the problem 2. Establish a theory of probable cause 3. Test the theory to determine cause 4. Establish a plan of action to resolve the problem and identify potential effects 5. Implement the solution or escalate as necessary 6. Verify full system functionality and if applicable implement preventative measures 7. Document findings, actions, and outcomes |
|
|
What device or tool is used to test the voltage and current for power sources? |
a multimeter |
|
|
Which device can you use to determine the length of a network cable? |
a time domain reflectometer (TDR) |
|
|
What occurs when two copper connectors touch each other? |
a short, which diverts the current due to lower resistance |
|
|
What can you do to prevent a switching loop? |
Implement spanning tree protocol (STP). |
|
|
What is the first step in troubleshooting a network problem? |
To establish or identify the symptoms |
|
|
What are looking glass sites? |
sites that view routing information from a server's perspective using BorderGateway Protocol (BGP) routes |
|
|
What does the acronym SFP denote? |
Small Form-factor Pluggable |
|
|
What is crosstalk? |
a specialized type of EMI caused by parallel runs of twisted-pair cables |
|
|
What do objects that act as reflectors of a wireless signal cause? |
multipath distortion |
|
|
According to the general troubleshooting model, what should you do after establishing the symptoms of a problem? |
You should identify the affected area. |
|
|
What term is used to describe the situation where a wireless access point has reached the maximum number of connected devices? |
device saturation |
|
|
What is the UNIX/Linux equivalent to the nslookup command? |
dig |
|
|
What is a gigabit interface converter (GBIC)? |
a transceiver used only on gigabit networks |
|
|
What does VLAN trunking do? |
It allows traffic from all VLAN to cross a single cable between two switches. |
|
|
What forwards traffic based on pre-configured priorities to ensure that quality is maintained? |
Quality of Service (QoS) |
|
|
What runs on SNMP managed devices? |
the Simple Network Management Protocol (SNMP) agent |
|
|
How does full-duplex mode affect traffic? |
Traffic can be transmitted in both directions at the same time. |
|
|
Which device can be used to test for short circuits and breaks in wires? |
a multimeter |
|
|
Which special type of connector is used while testing a network interface card? |
a hardware loopback |
|
|
Which TCP/IP utility is used to view a list of IP addresses and the MAC addresses to which they are resolved? |
arp |
|
|
Which tool is used to terminate twisted-pair wires on a patch panel? |
a punchdown tool |
|
|
What can a hacker use to defeat a MAC address filter? |
a packet sniffer |
|
|
What measures the ability of the cable to resist crosstalk? |
Near-end crosstalk (NEXT) |
|
|
What occurs when the cabling connectors are configured with the wrong individual pin in the connector sockets? |
incorrect termination |
|
|
What term is used to describe the situation where a wireless network has run out of bandwidth for the devices connected to it? |
bandwidth saturation |
|
|
When a computer has access to several different wireless networks, how do you ensure that the computer connects to a specific one? |
Set the wireless network you want the computer to use as the preferred network. |
|
|
What does the acronym LWAPP denote? |
Light Weight Access Point Protocol |
|
|
What is another term for NIC teaming? |
load balancing and failover (LBFO) |
