Total Pageviews

Thursday, October 15, 2015

Job Description for Network Administrator, IT

Job Description for Network Administrator, IT

Network administrators, IT are responsible for keeping their organization's computer network up to date. They must make sure that their system runs smoothly and efficiently. Their tasks include performing component installation, system updates, system repairs, and system testing. They must update the organization's software regularly. They are responsible for backing up data and information relevant to their computer system. They must install security software, such as virus protection and firewalls and run updates on them on a regular and timely basis. They must be able to troubleshoot network issues. They must be thoroughly familiar with their organization’s information technology (IT) hardware and infrastructure. They must have proven experience in network architecture.
Excellent communications skills are required, since network administrator must work with internal clients from different departments of their company, external clients, or computer vendors. They must be flexible. They may be on call 24/7.

Employers prefer that network administrators have a bachelor’s degree from an accredited college or university in information technology, computer science, or other relevant fields. Some employers prefer that their network administrators possess professional certification, such as Microsoft Certified Systems Engineer, Cisco Certified Network Associate, or Microsoft Certified Systems Administrator. They must keep themselves up to date with various new technology coming into the marketplace. They may have to travel to clients’ or vendors’ sites. They may have to coach and mentor new or more junior network administrators. They may be required to continuously attend various computer-related classes, workshops, or conferences.

Network Administrator, IT Tasks

  • Provide hands-on network administration support, network maintenance and operations support.
  • Recommend networking software and hardware enhancements.
  • Build, configure, and troubleshoot local area network (LAN), wide area network (WAN), and other company networks.
  • Diagnose and correct network systems issues.

Wednesday, October 14, 2015

Knowledge Assessment server

Fill in the Blank


Complete the following sentences by writing the correct word or words in the blanks provided.
1.
A ________ is a primary duty that a server performs.
2.
The computer, including servers, is built around one or more integrated chips called the ________.

3.
A ________ processor can typically process more data at the same time and can access much more memory than a 32-bit processor.
4.
Making sure you have sufficient ________ is one of the biggest factors in performance, even more than disk and processor.
5.
For the processor to communicate with the rest of the system, the processor plugs in or connects to a large circuit board called the ________.
6.
Firmware is software contained in ________ chips.
7.
Instructions that control much of the computer’s input/output functions, such as communicating with disks, RAM, and the monitor kept in the System ROM chips, are known as the ________.
8.
The process of updating your system ROM BIOS, is called ________ the BIOS.
9.
________ installation provides a minimal environment with no Windows Explorer shell for running specific server roles and no Start button.
10.
A(n) ________ is an XML file that stores the answers for a series of graphical user interface (GUI) dialog boxes.

Multiple Choice

Circle the letter that corresponds to the best answer.
1.
What technology provided by Microsoft is used to perform a network-based installation of Windows operating systems including Windows XP, Windows Vista, Windows Server 2003, and Windows Server 2008?
  • a. IAS
  • b. Server Core
  • c. SIM
  • d. WDS
2.
What does the name of the answer file on a USB drive have to be to perform an automatic installation?
  • a. autounattend.xml
  • b. auto.xml
  • c. auto.txt
  • d. automatic.xml
3.
What is the program you should use to create or validate an answer file used to install Windows?
  • a. IAS
  • b. Server Core
  • c. SIM
  • d. WDS
4.
What is the maximum amount of memory that Windows Server 2008 R2 Standard Edition requires?
  • a. 2 GB
  • b. 4 GB
  • c. 32 GB
  • d. 64 GB
5.
How many grace period days do you have in which to activate Windows Server 2008 R2?
  • a. 3 days
  • b. 10 days
  • c. 15 days
  • d. 30 days

6.
Which of the following is not a primary subsystem found in a server?
  • a. Processor
  • b. Memory
  • c. Sound
  • d. Storage
7.
What type of installation do you use that starts from scratch?
  • a. A clean upgrade
  • b. A clean installation
  • c. A formatting installation
  • d. A backup installation
8.
What command would you use to prepare a Windows installation for imaging that will remove the SID and computer name?
  • a. Sys
  • b. Sysprep
  • c. SIDPrep
  • d. WDSPrep
9.
What does Microsoft use to fight pirated copies of Windows?
  • a. WDS
  • b. IAS
  • c. Sysprep
  • d. Activation
10.
Which edition of Windows Server 2008 R2 gives you the most access to processors and memory?
  • a. Foundation
  • b. Standard
  • c. Enterprise
  • d. Datacenter

True / False

Circle T if the statement is true or F if the statement is false.

the Tracert Command Syntax

The tracert command is used to visually see a network packet being sent and received and the amount of hops required for that packet to get to its destination.



Using the tracert command

If you are having connectivity problems, you can use the tracert command to check the path to the destination IP address that you want to reach and record the results. The tracert command displays the series of IP routers that are used in delivering packets from your computer to the destination and how long it took on each hop. If the packets are unable to be delivered to the destination, the tracert command displays the last router that successfully forwarded your packets.
For more information about the tracert command, you can type tracert -? at a command prompt.
The most common use of tracert is as follows:
tracert IP address [-d]


This returns a list of the routers that are crossed to get to IP address. By using the -d option, the router path is displayed faster because tracert does not try to resolve the names of the routers in the path.

Tracert Command Syntax

tracert [-d] [-h MaxHops] [-w TimeOut] [-4] [-6] target [/?]


Tip: See How To Read Command Syntax if you're having a hard time understanding the tracert syntax above.
-d = This option prevents tracert from resolving IP addresses to hostnames, often resulting in much faster results.
-h MaxHops = This tracert option specifies the maximum number of hops in the search for the target.

Ethernet Version 2 and IEEE 802.3 Physical Characteristics


The table below lists the Ethernet version 2 and IEEE 802.3 physical characteristics of the different Ethernet cables.
  Ethernet IEEE 802.3
10Base5 10Base2 10BaseT
Data rate (Mbps) 10 10 10 10
Signaling method Baseband Baseband Baseband Baseband
Maximum segment length (m) 500 500 185 100 (Unshielded twisted pair - UTP)
Media 50-ohm coax (thick) 50-ohm coax (thick) 50-ohm coax (thin) Unshielded twisted pair (UTP)
Topology Bus Bus Bus Star
//

IEEE 802.3u Physical Characteristics

The table below lists the IEEE 802.3u physical characteristics for the Ethernet 100BaseT cable.
Parameter 100BaseT
Data rate (Mbps) 100
Signaling method Baseband
Maximum segment length (in meters) 100 m between DTE7 and repeaters
Media RJ-45: Category 5 UTP MII: Category 3, 4, or 5, 150-ohm UTP or STP, with appropriate transceiver
Topology Star/Hub


//

10Base2 Sherifview Maximum Length Baseband Cable Technology

networking (Or "cheapernet")


The variant of Ethernet that uses thin coaxial cable (RG-58 or similar),


as opposed to 10base5 cable.



The "10" means 10 Mbps, "base" means "baseband" as opposed to radio frequency


and "2" means


a maximum single cable length of 200m.


navigation, search
10BASE2 cable showing the BNC connector end.
10BASE2 cable with a BNC T-connector.
10BASE2 cable end terminator.
EAD outlet
Different types of T-connectors, with AAUIs
10BASE2 (also known as cheapernet, thin Ethernet, thinnet, and thinwire) is a variant of Ethernet that uses thin coaxial cable (RG-58A/U )

Media Converters

10/100 Base-TX and 10/100/1000 Base-TX copper to fiber media converters with LC, SC, or ST connector options


Network Specifications Names 10BaseT Base Speed Transmission Technology Physical Media Sherifview

10BaseT


10 Seed 10 Mbps


100 Speed 100 Mbps


1000 Speed 1Gbps


T Physical medium used for transport T (twisted-pair)


10BaseT


100BaseTX using UTP Cat 5 cabling ... 100-meters limit


100BaseFX using two strands of multimode fiber-optic cable per link; most high-speed
                    backbones are 100BaseFX; 400-meter limit


FDDI


ATM


1000BaseFX


100VG-AnyLAN


10Base2
10BaseT4
10BaseFB
10BaseFL
10BaseFP
10Broad36


/////////////////
Chapter 8 , Switches and Hubs
page 212 Cisco: A Beginner's Guide






(or sometimes either STP
                    or UTP copper, called CDDI) 



Saturday, October 10, 2015

upper-layer protocol Transmission Control Protocol (TCP) and User Datagram Protocol (UDP).

upper-layer protocol – A protocol above IP that uses IP as its transport. Examples of upper-layer protocols include Internet layer protocols such as the Internet Control Message Protocol (ICMP) and Transport layer protocols such as the Transmission Control Protocol (TCP) and User Datagram Protocol (UDP).