Half duplex vs full duplex
Recently the application running on one of our clusters had problems when some of the servers had problems accessing the NFS storage. The analysis showed there to be a mismatch between the QFE interfaces and the network protocol. The QFEs were operating at half duplex while the network was expecting full. The cluster servers had [...]

Answer Question   |  July 21, 2009  6:11 PM
Full Duplex, Half Duplex, Network Interface Cards, NFS, NFS Storage, RAID

New member contest: ASK, Answer and Win a $50 Amazon gift card
As 2008 winds to a close, IT Knowledge Exchange has one more fun contest to end the year. From today until December 23rd, you can enter to win one of ten $50 (US) Amazon.com gift cards. There are two things, however, that you must do in order to enter: 1. Ask 2 questions 2. Answer [...]

Answer Question   |  June 22, 2012  3:45 PM
AS/400, CIO, CRM, Database, DataCenter, DataManagement, Development, Exchange, Linux, Lotus Domino, Microsoft Windows, Mobile, Networking, Oracle, Security, SQL Server, Storage, Virtualization, VoIP

How to add a subinterface in Cisco 2811 router
how to add a subinterface in router 2811

Answer Question   |  December 4, 2008  12:58 PM
Cisco, Cisco 2811, Cisco IOS, Cisco Routers, Cisco subinterface configuration, Router configuration, Routers, Subinterface, Subinterface configuration

Lost DNS in Windows Server 2003 Domain
In my branch office, there are two window 2003 DC, one DC with DNS, another DC with DHCP. the HD of DC with DNS is crashed. how to rebuild the DNS?

Answer Question   |  December 5, 2008  10:28 AM
DHCP, DNS, DNS server, DNS server crashed, Domain Controller, Domain Name System, Dynamic Host Configuration Protocol, Windows Server 2003

Database offline vs Database stopped vs Database network disconnected?
How Database Offline is different from Database Stopped? How Database Offline is different from DB network disconnection? How Database Stopped is different from DB network disconnection? Appreciate your help.

Answer Question   |  December 4, 2008  4:51 AM
Database administration, Database connectivity, Database management, DB2, Network connectivity, Oracle, SQL Database, SQL Server 2005

Event ID:10010
Not able to ping the machine with the hostname/Netbios name.

Answer Question   |  December 5, 2008  3:58 AM
Event ID 10010, Network connectivity, Ping, Remote access, Remote connectivity, RPC

Vary on failed for TCP/IP
We have an iSeries 270 with seemed to have lost TCPIP communication. The TCPIP interface info comes up with status ‘inactive’ when started. I have tried recreating the line controller with information from IBM but still says ‘TCPIP vary on failed.

Answer Question   |  December 3, 2008  11:32 PM
AS/400, iSeries 270, TCP/IP, Vary on failed

How organizations deal with network design for disaster recovery
I am looking for some information about how organizations deal with network design for disaster recovery. Specifically, my issue is about DNS domains, and whether to have a single network with a redundant warm site in a single domain shared by production processing, requiring unique IP addresses and server names in the secondary site, and [...]

Answer Question   |  December 2, 2008  10:53 PM
Disaster Recovery, DNS, Network design, Networking, Organizations, Testing

What do the standard numbers mean in the National Electrical Code?
What do the standard numbers mean in regards to the National Electrical Code (NEC)?

Answer Question   |  December 2, 2008  10:49 PM
codes, NEC, Networking, standards

How many bandwidth signals can transfer through a coaxial cable?
If a video signal contains a bandwidth of 3 MHz, audio signal contains bandwidth of 4 MHz and a color signal contains a bandwidth of 5 MHz, how can these signals transfer through a coaxial cable that has a bandwidth of 6 MHz?

Answer Question   |  March 21, 2011  10:45 PM
Bandwidth, Coaxial cable, Network cable, Networking

Simple Switch config help!
Hi there, I have a very simple setup that I need to do on a Layer 2 Switch that has static routing. The switch has 24 ports and 16 of them will be used for the local network, and 6 of them for a DMZ. I just cant get the 6 DMZ port to work…I [...]

Answer Question   |  December 3, 2008  10:45 PM
NetGear GSM7224R, Networking, Switches, VLAN

etherchannel
what protocol does etherchannel uses to communicate between switches, routers and servers ?

Answer Question   |  February 23, 2009  10:38 PM
AIX 5L, EtherChannel, Load balancing, Server blades

Hyper-V remote management tools not working over VPN
When i try and run some Hyper V remote management tools over the VPN (wireless connection) I receive a “Access Denied: Unable to establish communication” error message. Is this an issue with my VPN? or something else

Answer Question   |  February 3, 2009  9:56 PM
Hyper-V, Hyper-V Error Messages, Hyper-V Manager, Hyper-V Remote Management Tools, VPN Error Messages

Complex Database Issue
I’ll try to be brief: I have excel files that are downloaded via ftp to a folder where I have my DB. each of the excel files is “roughly” the same headers, I want to import all of these files, filter out all but 3 columns and then filter out certain rows in each table [...]

Answer Question   |  December 4, 2008  8:37 PM
Access 2003, Access Database, Database, FTP, Microsoft Access, Microsoft Excel, Sorting

switchport access vs switchport trunk
When do I use a switchport trunk vs switchport access?

Answer Question   |  December 2, 2008  8:36 PM
Switchport Access, Switchport Access vs Switchport Trunk, Switchport Trunk

How to improve this network design
here’s the network diagram of my company’s small network. i want to improve this network design in order to protect it from external threats. please tell me what would be the best place for a router and which router (please specify the model) would be best suitable for this small setup. upon your answer, i’ll [...]

Answer Question   |  March 19, 2009  6:32 PM
Network architecture, Network design, Network Topology, Routers

Is AES the best encryption for enterprise routers
Is AES the best encryption for enterprise routers? How many letters& alpha numberic keys need for AES password?

Answer Question   |  December 2, 2008  3:01 AM
AES encryption, Network Encryption, Routers

IP address gets blacklisted using Exchange 2003
We have a small business server running exchange 2003. My IP address is keep getting blacklisted. When I research, I come to find out that something in my network is sending out spam but I can’t seem to figure out which machine is infected. I have ran several scans on all the machines but nothing [...]

Answer Question   |  December 3, 2008  4:07 PM
Blacklisted, Exchange 2003, IP address, SBS, Spam

Ethernet Not Available
I recently updated my windows because my c: drive quit working. I had to install windows on d: drive in order to get my computer to even work. I then updated my c: drive with windows update (I had to have windows on the computer in order to update my c: drive-c: drive was missing [...]

Answer Question   |  December 3, 2008  3:04 PM
Ethernet, Hard drives, Installation, Updates

You do not have access to log on to this session
when i first time log in on domain remotly,it logs in easily but after logging off when i again try to to login on domail i get “you do not have access to log on to this session”.

Answer Question   |  August 30, 2009  7:55 AM
Remote access, Remote connection, User Permissions