Identify the affected area. Establish the symptoms. Identify the person who reported the problem. Established what has changed.
Answer/Explanation
The following list comes from CompTIA and needs to be committed to memory in the following order. Establish the symptoms - What is not working? Identify the affected area - Is this locally or is this WAN wide? Establish what has changed - Was new software added, new hardware added etc. Select the most probable cause - Hardware or software. Implement a solution based on what the probable cause is. Test the result after implementing the solution. Is it fixed!? Recognize the potential effects of the solution - Did the solution affect any other operations? Document the solution in case it is duplicated later down the road.
Broadband Baseband PPTP Thicknet
Dividing multiple signals up on a cable simultaneously is referred to as multiplexing, and is done with FDM. This is how we get multiple channels with our cable TV. These signals may be further divided up into time slots under some circumstances with TDM (Time division multiplexing). TDM may be used with Baseband, but STDM (Statistical Time division multiplexing) is the most common method. PPTP (point to point tunneling protocol). Thicknet is Baseband and does not useFDM.
Data link layer Session layer Transport layer Presentation layer
The DOD Host to Host layer maps to the Transport layer of the 7-layer of the OSI model. The Data link layer and the Physical layer of the OSI map to the DOD Network access layer. The OSI Session layer, Application layer, and Presentation layer, map to the DOD Process and Application layer.
The cd command The lcd command. The mget command The ASCII command.
When changing directories on the local machine when you have successfully logged in to an FTP server use the lcd command. (It is not case sensitive) Your screen will look similar to this: ftp:\> user xxxxxxxx logged in. ftp:\> lcd windows Local directory now c:\windows ftp> The cd command is used to changes the directory on the remote machine. The mget command will allow multiple downloads from a, FTP site. The ASCII command is used to switch transfers to the default ASCII mode.
Contention Token passing Polling Radio waves Only 2 answers are correct.
Contention is all machines contending for a chance to transmit, CSMA/CD, which is used by Ethernet. Token passing is used by FDDI and Token Ring networks. Many retail stores use polling. The controller polls the store to see if has data to send (sales). Radio waves do not fall in the category of media access. For 802.11 media access would be CSMA/CA.
There must be something inoperative inside the cloud (Telecommunications company). The cable between the DSL modem and the server (SVR) is bad. DSL modem is inoperative. The NIC inside the server is not communicating.
Since all communications elsewhere within this network are operative then it has to be the modem. Plus the questions states that the lights are on at the server side. When troubleshooting, always look for those lights, they may not be the total answer, but they sure are helpful. If the NIC in the server was bad then the lights on the modem wouldn't be lit, and the same would go for the cable between the server and the modem. As far as the Telco problem goes, my first choice is the modem because of the lights. The Net+ exam is going to want us to know about troubleshooting with lights.
PAP CHAP SPAP Kerberos
CHAP (Challenge handshake authentication protocol) is used for encrypted authentication using the one way MD-5 (Message digest 5) hashing algorithm. SPAP (Shiva password authentication protocol that is used by Shiva servers. It is better than PAP but not as good as CHAP. Kerberos is the Windows 2000 and XP default authentication protocol. It cannot be used on other Microsoft products, so beware of this on the exam. For multi Microsoft operating system authentication NTLM (Network LAN Manager is used locally). PAP (Password authentication protocol) sends the user name and the password across the WAN link in clear text.
It may be used to initiate the remote installation of an operating system. It requires that the MAC address of the station be manually inputted at the server. It resolves the IP address to a MAC address. It works at layer 2 of the OSI model.
BootP is a scaled down version of DHCP (Dynamic Host Configuration Protocol). One major consideration with BootP, is that the MAC address must be manually put into a MAC table for BootP to retrieve. Once a PC boots up a broadcast is made requesting an IP address. Immediately thereafter the O/S may be loaded. This is commonly seen on diskless workstations (thin clients) and often times at many major retail stores. BootP does not resolve IP addresses to MAC addresses. ARP (Address resolution protocol) does this. BootP resides at layer 3. BootP resides at layer 3.
Stand by servers RAID 5 with SCSI Implement a PDC and a BDC on your network. Server clustering
By far the best fault tolerance would be server clustering, and preferably 'hot sites'. A hot site would be where all servers have a duplicate copy of everything, thus 100% redundancy, and it would not be unusual to have these servers connected together via a fiber link. If there is a need for "100% up time", then 'Hot site clustering' would be the best solution. Server clustering also serves the purpose of load balancing, which reduces the workload on any one server. Stand by servers provide an excellent means of fault tolerance, but do not provide the highest level of fault tolerance, as the question asks. RAID 5 provides excellent fault tolerance but it is not the highest level. SCSI would provide for speed, and has nothing to do with fault tolerance. Implementing a PDC and a BDC is good fault tolerance for Microsoft NT4 only.
Class I Class III Class II All of the above
A Class I repeater can support both 100BaseT and 100BaseT4 at the same time in the same collision domain. Class II repeaters can only support either 100BaseT or 100BaseTX at a time. The difference is due to the propagation delay (latency). A Class I repeater has a higher propagation delay than a Class II repeater. I know it sounds backward. Bottom line for the exam is to understand which may be used and where.
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