Term
| The 7 steps of network troubleshooting are: |
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Definition
1. Identify the problem
2. Establish a theory
3. Test the theory
4. Establish a plan of action
5. Implement the solution or escalate
6. Verify full system functionality
7. Document findings, actions, & outcomes. |
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Term
| Step 1 (Identify the problem) focuses on three key sources: the ___ (in the form of logs and error messages), the ___ ___ experiencing the problem, and your own ___. |
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Definition
computer
computer user
observation |
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Term
| ___ problems are related to the actual cable used in a network. |
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Definition
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Term
| ___ problems are classified as those related to network devices such as hubs, switches, and routers. |
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Definition
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Term
| An Ethernet network can have only a single active path between devices on a network. When multiple active paths are available, a ___ ___ can occur. |
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Definition
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Term
| Spanning Tree Protocol (STP) is designed to prevent ___ ___s. |
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Definition
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Term
| Switching loops occur at the ___ layer of the OSI model. |
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Definition
| data link layer (Layer 2) |
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Term
| A ___ ___ occurs when data packets continue to be routed in an endless circle. |
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Definition
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Term
| ___ loops are detectable because they can quickly bog down a network, and the destination system does not receive some packets. |
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Definition
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Term
| A ___ problem typically occurs when routing tables contain information that does not reflect the correct topology of the internetwork. |
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Definition
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Term
In a ___ ___ configuration, one system
or network device answers ARP requests for another system. |
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Definition
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Term
| A ___ ___ occurs when a network is overwhelmed with constant broadcast or multicast traffic. It can be caused by faulty hardware such as a NIC that continually sends data, switching loops, or even faulty applications running on the network. |
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Definition
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Term
| A ___ is a useful tool for identifying broadcast storms. |
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Definition
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Term
| Router port ___ and port ___ are essentially the same thing. |
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Definition
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Term
| A ___ ___ can occur when a router does not send back an expected message that the data has been received. |
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Definition
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Term
| A ___ ___ occurs when the packet the router receives is larger than the configured size of the Maximum Transmission Unit (MTU) and the Do Not Fragment flag is configured on that packet. |
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Definition
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Term
| When a black hole occurs, use the ___ utility to check that packets of a particular size can move through the router. Use the ___ switch to set a packet size and the ___ switch to set the do not fragment bit. |
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Definition
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Term
| A bad ___ is one that cannot successfully deliver packets. |
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Definition
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Term
| When a bad or missing route is discovered, route ___ can disable the route by setting the hop count to a high number. |
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Definition
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Term
| When the ___ ___ setting is incorrect, the router tries to forward data to subnets that don't exist. |
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Definition
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Term
| The ___ ___ configured on the router is where the data goes after it leaves the local network. |
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Definition
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Term
| After setting the default gateway(s), use the ___ and ___ utilities to verify connectivity and proper configuration. |
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Definition
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Term
| Every ___ ___ on a network must be unique. This includes every host, router and network card. |
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Definition
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Term
| To avoid name resolution problems, verify the ___ entries in the router configuration. |
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Definition
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Term
| When troubleshooting wiring problems, locate the cable to see if the problem is caused by ___ or ___. |
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Definition
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Term
| Copper-based cabling (coax or UTP) is susceptible to ___, which happens when the signal in one cable gets mixed up with the signal in another cable. |
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Definition
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Term
| Thee two types of crosstalk interference are ___ ___ and ___ ___. |
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Definition
Near End Cross Talk (NEXT)
Far End Cross Talk (FEXT) |
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Term
| ___ ___ crosstalk occurs when an outgoing data transmission leaks over to an incoming transmission. |
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Definition
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Term
| ___ ___ crosstalk occurs when a receiving station overhears a data signal being sent by a transmitting station at the other end of a transmission line. |
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Definition
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Term
| ___ ___ ___ can reduce or corrupt signal strength and generally happens when cables are run too close to computer monitors, fluorescent lighting, elevators, microwaves, etc. |
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Definition
| Electromagnetic Interference (EMI) |
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Term
| The weakening of data signals as they traverse the medium is called ___. |
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Definition
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Term
| All ___-based cabling is susceptible to attenuation. |
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Definition
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Term
| When a cable has to be run farther than the recommended length, a ___ ___ can be used to boost the signal as it travels. |
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Definition
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Term
| ___ refers to the total opposition a circuit or device offers to the flow of a signal, measured in ohms. |
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Definition
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Term
To prevent ___ ___, use cable rated
with the same impedance rating. |
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Definition
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Term
| An obvious sign that a ___ may be bad is when the network’s problems can be isolated to one location. |
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Definition
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Term
| If connectors do not appear questionable but the problem is isolated to one run, bad ___ is the next logical culprit. |
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Definition
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Term
| Use a multifunction cable tester Type __ to troubleshoot most wiring problems. |
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Definition
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Term
| A ___ ___ fault occurs when the cables are not making a full circuit. |
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Definition
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Term
| A ___ ___ tester can be used to identify an open short fault. |
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Definition
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Term
| Each ___ in a cable can reduce the strength of the signal. |
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Definition
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Term
| The loss of signal strength is measured in ___s. |
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Definition
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Term
True or false?
dB loss is associated with almost every wiring component. |
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Definition
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Term
| You can test dB loss using a ___ meter, or ___ test. |
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Definition
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Term
| A ___ cable is intended for specific applications only (such as networking two PCs without a hub or switch) and will cause problems when used where a straight-through cable is called for. |
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Definition
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Term
| Incorrect cable ___ can make it susceptible to problems with interference, attenuation, and overall usability. |
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Definition
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Term
| At the very minimum, an IP address and subnet mask are required to connect to a TCP/IP network. With just this minimum configuration, connectivity is limited to the ___ segment and ___ resolution is impossible. |
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Definition
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Term
| If a client system is unable to log on to a network, ensure that the ___ setting and ___ speeds are correctly set for the network. |
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Definition
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Term
| If systems in a VLAN are moved, you need to know how to reconnect them and forward them to the correct VLAN ___. |
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Definition
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Term
| ___ VLAN assignment uses software to reduce the human error associated with static VLAN assignment. |
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Definition
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