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CompTIA Network+ Tricky Questions
Questions that I am having trouble remembering for the CompTIA Network+ certification.
63
Computer Networking
Professional
02/01/2010

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Term
Specified Distance and medium of 1000Base-LX (2 types)
Definition
SMF - 5KM; MMF - 550M
Term
Specified Distance and medium of 1000Base-T
Definition
Twisted-pair cabling (CAT-5, CAT-5e, CAT-6, or CAT-7) - 100M
Term
Specified Distance and medium of 1000Base-CX
Definition
Balanced copper cabling - 25M
Term
Specified Distance of 1000Base-SX
Definition
MMF - 220 to 550m (depending on fiber diameter & bandwidth
Term
100BASE-TX
Definition
Fast Ethernet - CAT 5 cable or above
Term
100BASE-FX
Definition
Fast Ethernet over optical wire; half-duplex - 400m; full-duplex over mmf - 2km; full-duplex over smf - 10km
Term
100 pair cable is typical used to connect:
Definition
telephony distrobution
Term
Which tool would you use to test the break in a fiber connection on the network?
Definition
OTDR (optical time-domain reflectometer)
Term
What is the best tool to test the connection at a demarcation point on a 66 block when no dial tone is present?
Definition
Butt set
Term
What is the maximum amount of wires that fit into an RJ-11 connector?
Definition
4
Term
What is best to configure on a workstation to block certain websites and ports?
Definition
Host-based firewall
Term
What are two characteristics of SMF?
Definition
Can be used for distances over 2km & uses laser light for transmission
Term
Which tool measures in Ohms?
Definition
Multimeter
Term
EGP
Definition
Exterior Gateway Protocol, replaced by BGP, EGP is a simple reachability protocol, and, unlike modern distance-vector and path-vector protocols, it is limited to tree-like topologies
Term
What is used to transfer data between subnets?
Definition
routers
Term
What allows certain ports to be part of the same group while other ports within that switch are part of a different group?
Definition
Enabling VLAN
Term
What can an application layer firewall filter that a network layer firewall cannot?
Definition
HTTP URLs
Term
What is a set of techniques that create a network without manual operator intervention or special configuration servers
Definition
Zerconf
Term
What masks an IP address of a device from outside the network?
Definition
NAT (Network Address Translation)
Term
What tools could you use to determine that a machine was using the correct DNS server?
Definition
ipconfig and ifconfig
Term
Does TFTP transmit on UDP or TCP ports?
Definition
UDP
Term
What is the maximum CAT 3 length acceptable for a horizontal cross connect?
Definition
100M
Term
What layer of the OSI model does a hub operate on?
Definition
Layer 1
Term
What cable is used to connect multiple layer 2 switches?
Definition
Crossover cable
Term
Max range of 10GBase-EW?
Definition
40km
Term
What configures a PC's IP address if static addressing isn't configured and the DHCP server is unavailable?
Definition
APIPA
Term
What's an automated application capable of infecting computers without user interaction?
Definition
A worm
Term
What item changes the the encryption key on a user's session after a set period of time?
Definition
TKIP (Temporal Key Integrity Protocol)
Term
What is the range of multicast IP addresses?
Definition
224.0.0.0 through 239.255.255.255
Term
What protocol would be used to trunk multiple VLAN traffic across the same physical link? This protocol also allows for individual VLANs to communicate with one another with the use of a switch with layer-3 capabilities, or a router.
Definition
801.2q, or VLAN tagging
Term
What can be enabled to mitigate risk from Rogue Access Points?
Definition
Enabling MAC address filtering
Term
Which authentication method uses public and private keys to secure communication and ensure the senders identity?
Definition
PKI
Term
What type of cable is used to test the operation of a NIC?
Definition
Loopback Cable
Term
What are the two IEEE designators for Spanning Tree Protocol?
Definition
802.1d and 802.1w
Term
What is the time required by protocols to update their forwarding tables after changes have occured?
Definition
Routing convergence time
Term
What cables would be used when connecting two devices for voice on a vertical connect?
Definition
25 pair cable
Term
Toner Probe can be used to:
Definition
Locate positions in cross connections
Term
Which WAN technology uses DWDM (dense wavelength division multiplexing)?
Definition
SONET
Term
What uses port 123?
Definition
NTP (network time protocol)
Term
A network is ___________ when all routers in a network agree about the path from one point to another
Definition
Converged
Term
What can indicate the wrong hostname on a workstation?
Definition
When ping doesn't produce a reply yet the workstation is part of the domain and is able to get to the internet
Term
What is the likely cause of a computer being unable to reach network resources after it has been unplugged from a network for a week and in the mean time several computers were added to the network?
Definition
The DHCP pool limit has been reached
Term
What tool would be used to determine if the connection is punched down and there is noise coming across the cable?
Definition
Cable tester
Term
The function of a tone generator is to generate a tone to test:
Definition
Continuity (not signal strength, impedance, or feedback)
Term
What command would return the following output in a Windows environment? ****Request timed out ****Request timed out
Definition
tracert
Term
What is the difference between 10Base-T and 100Base-T?
Definition
Shorter timing between Ethernet frames
Term
What is the max hop count for RIPv2?
Definition
16
Term
What software types would best be used for identifying an attack?
Definition
IDS (intrusion detection system)
Term
Which punch-down block is best suited for high-speed data transmission?
Definition
110 punch-down block
Term
What cable has a solid Kevlar center to restrict it from making a 90 degree bend
Definition
CAT 6
Term
What type of cable reduces toxic gas released during a fire?
Definition
Plenum
Term
What tool enables technicians to trace cables in multiple pair wiring?
Definition
Toner Probe
Term
What should you use to connect three desktop computers to an existing network when there is only one network connection available?
Definition
Switch
Term
Which device uses IEEE 1394 standard?
Definition
Firewire
Term
Which tool sends a signal down a cable and measures how long it takes to come back?
Definition
TDR
Term
If a new network has a 802.11n wireless card but won't connect to their existing 802.11a network, why won't the laptop connect?
Definition
Standard mismatch
Term
What device can be remotely looped for troubleshooting purposes?
Definition
A smart jack
Term
What is the first criterion used to select next hop from the routing table?
Definition
Most precise matching prefix
Term
What security mitigation technique is most effective against zero-day attacks?
Definition
User awareness training
Term
What routing protocol uses a state algorithm?
Definition
OSPF (open shortest-path first), a link-state protocol and perhaps most common interior gateway protocol
Term
What do you need to install to connect a fiber NIC to an Ethernet backbone?
Definition
Media converter
Term
What IEEE standard has the max bandwidth of 54Mbps at 5GHz?
Definition
802.11a
Term
What routing protocol uses AS-Path as one of the methods to build a routing table?
Definition
BGP
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