ARP, Layer 2 Broadcasts, Switches and NICs
How does ARP work with layer 2 broadcasts? What I mean is, if an IP address is not yet in its cache, ARP broadcasts an ARP request in order to discover the corresponding MAC address, right? Does that mean that the hardware address of the Ethernet frame that encapsulates the ARP request is...
How does ARP work with layer 2 broadcasts? What I mean is, if an IP address is not yet in its cache, ARP broadcasts an ARP request in order to discover the corresponding MAC address, right? Does that mean that the hardware address of the Ethernet frame that encapsulates the ARP request is...
0 pts.
Setting Up VLAN across WAN link for Testing
I am trying to setup a Vlan via a WAN Link. Local End has already 4 VLANs. Remote End doesn't. Remote end needs to access VLAN id 4 via the WAN link. Local Gateway router = Cisco 3660 Remote Gateway Router = Cisco 3660 Local Switch = Cisco 3750 Remote Switch = Cisco 2924 What is the config that...
I am trying to setup a Vlan via a WAN Link. Local End has already 4 VLANs. Remote End doesn't. Remote end needs to access VLAN id 4 via the WAN link. Local Gateway router = Cisco 3660 Remote Gateway Router = Cisco 3660 Local Switch = Cisco 3750 Remote Switch = Cisco 2924 What is the config that...
AOL Spammer IP Identification
Concerning the ever increasing amount of received spam, to battle this I have a program with which I can extract the IP address from the sender for reporting purposes, however, I have been receiving an increasing amount from AOL proxy server for which I cannot aquire the senders IP address. Is...
Concerning the ever increasing amount of received spam, to battle this I have a program with which I can extract the IP address from the sender for reporting purposes, however, I have been receiving an increasing amount from AOL proxy server for which I cannot aquire the senders IP address. Is...
Stop bit problem: USB to Serial Converter attached to motion controller, unable to set for 7-E-2
I have three different USB to Serial converters, one of them an isolated converter from B&B. One brand of motion controller I work on uses EVEN parity / 7 data bits / 2 stop bits as its default. I find that none of my converters will work on the controller in this configuration. If I borrow a...
I have three different USB to Serial converters, one of them an isolated converter from B&B. One brand of motion controller I work on uses EVEN parity / 7 data bits / 2 stop bits as its default. I find that none of my converters will work on the controller in this configuration. If I borrow a...
Upgrade step from win nt and win 2000 to win 2003
I have windowsNT and window 2000 servers with active directory which i want to upgrade to windows 2003,all servers meet requirement for new vesion.Now can same help me on how to upgrade?what steps should i take
I have windowsNT and window 2000 servers with active directory which i want to upgrade to windows 2003,all servers meet requirement for new vesion.Now can same help me on how to upgrade?what steps should i take
layer 2 & layer 3 switch
Hi All, what is the basic difference between layer 2 & layer 3 switch. how can configure layer 2 & layer3 managable switch
Hi All, what is the basic difference between layer 2 & layer 3 switch. how can configure layer 2 & layer3 managable switch
RIP Timers
Dear all, I am confused on RIP timers. Especially, Hold-Down timer. Can someone de-brief me with an example sceanrio that how each timer in RIP behaves and the co-relate with each other?
Dear all, I am confused on RIP timers. Especially, Hold-Down timer. Can someone de-brief me with an example sceanrio that how each timer in RIP behaves and the co-relate with each other?
Problem with Cisco Static nat rules
Hi you guys, We are currently in the process to replace our firewall with a Cisco pix 515. I?ve set it up in a testing environment in order to make a replica of the network so I can test everything. The way the network is setup right now we use NAT to translate the internet ip?s to the internal...
Hi you guys, We are currently in the process to replace our firewall with a Cisco pix 515. I?ve set it up in a testing environment in order to make a replica of the network so I can test everything. The way the network is setup right now we use NAT to translate the internet ip?s to the internal...
Trunking (router + vlan) and security
We have a switch with two VLAN. One VLAN is on the firewall/Internet side, the other VLAN is on the LAN side. The switch is connected to a router, like this http://www.cisco.com/warp/public/473/50a.jpg The router is connected to an MPLS cloud through another router. The job of the router is to...
We have a switch with two VLAN. One VLAN is on the firewall/Internet side, the other VLAN is on the LAN side. The switch is connected to a router, like this http://www.cisco.com/warp/public/473/50a.jpg The router is connected to an MPLS cloud through another router. The job of the router is to...
Will we really save money having users shut down computers at end of day?
The article below caught my attention. It says that 217 million dollars a year is wasted just in the UK alone by employees leaving computers on overnight. I never shut mine down...my old mentor thought it was actually harmful. Needless to say, we don't have a policy about shutting down computers...
The article below caught my attention. It says that 217 million dollars a year is wasted just in the UK alone by employees leaving computers on overnight. I never shut mine down...my old mentor thought it was actually harmful. Needless to say, we don't have a policy about shutting down computers...
NTP not functioning - Segmented Management VLAN
I'm configuring a building wide network of layer2 and layer3 ciscos to use NTP but I'm not getting ntp updates from the ntp servers. Drawing a picture of this would have a Collapsed Core of 2 4500s and 2950 Access switches are 2950s setup based on Cisco's typical building block network diagram. ...
I'm configuring a building wide network of layer2 and layer3 ciscos to use NTP but I'm not getting ntp updates from the ntp servers. Drawing a picture of this would have a Collapsed Core of 2 4500s and 2950 Access switches are 2950s setup based on Cisco's typical building block network diagram. ...
simple remote administration
hey y'all... is there a way to do the following remotely? change passwords create a share on a server hard drive I have the adminpak installed on my workstation which allows me to do it. I want to be able to do it from ANY computer on the network. I have Win2k3 servers only, and WinXP clients...
hey y'all... is there a way to do the following remotely? change passwords create a share on a server hard drive I have the adminpak installed on my workstation which allows me to do it. I want to be able to do it from ANY computer on the network. I have Win2k3 servers only, and WinXP clients...
Wiring/Krone connectors
Forwarding question: What are the implications of connecting 2 wire copper test equipment to the permanent wiring side of Krone connectors over the top of existing wires? My belief is that it can cause noise by spreading the blades to far apart. Is there an alternative connector that can be used...
Forwarding question: What are the implications of connecting 2 wire copper test equipment to the permanent wiring side of Krone connectors over the top of existing wires? My belief is that it can cause noise by spreading the blades to far apart. Is there an alternative connector that can be used...
What does "DB" mean, in DB-9 serial port?
Posted on behalf of Ben: What does "DB" mean, in DB-9 serial port?
Posted on behalf of Ben: What does "DB" mean, in DB-9 serial port?
Why do IT projects fail?-3
Hi, I'm a Computer Engineering at CSU Chico. I'm conducting a research paper on "Why IT Projects Fail". If someone could give me an example of a failed projects, "failed" meaning that it didn't get finished on time, or the final project did not meet the requierments. Also if you could give a...
Hi, I'm a Computer Engineering at CSU Chico. I'm conducting a research paper on "Why IT Projects Fail". If someone could give me an example of a failed projects, "failed" meaning that it didn't get finished on time, or the final project did not meet the requierments. Also if you could give a...
Why do IT projects fail?-2
Hi, I'm a Computer Engineering at CSU Chico. I'm conducting a research paper on "Why IT Projects Fail". If someone could give me an example of a failed projects, "failed" meaning that it didn't get finished on time, or the final project did not meet the requierments. Also if you could give a...
Hi, I'm a Computer Engineering at CSU Chico. I'm conducting a research paper on "Why IT Projects Fail". If someone could give me an example of a failed projects, "failed" meaning that it didn't get finished on time, or the final project did not meet the requierments. Also if you could give a...
File Synchronization
In a server 2003 environment, we sync our My Documents folder to the server. One user's account, when logging off, takes an enourmous amount of time to complete syncronize and he gets these errors repeatedly in the error log: offline files [\servernameusersusermy docs]UNABLE TO MAKE...
In a server 2003 environment, we sync our My Documents folder to the server. One user's account, when logging off, takes an enourmous amount of time to complete syncronize and he gets these errors repeatedly in the error log: offline files [\servernameusersusermy docs]UNABLE TO MAKE...
Looking for a UNIQUE KVM Solution
I'm looking for something unusual in the way of a KVM (Keyboard, Video, Mouse) system, and have no idea where to find such a thing - so I'll describe it. In this case, I'll happily take brand names, since this would be a commercial product. As part of my business, I visit sites which are running...
I'm looking for something unusual in the way of a KVM (Keyboard, Video, Mouse) system, and have no idea where to find such a thing - so I'll describe it. In this case, I'll happily take brand names, since this would be a commercial product. As part of my business, I visit sites which are running...
CCNA Prospects
Dear All, i'm working with wipro infotech as a technical representative since oct 2003, i have done CCNA, can you please tell me which kind of profile i can get and what should i do further so that i can become a network administrator of a big network(routers and switches). Warm regards
Dear All, i'm working with wipro infotech as a technical representative since oct 2003, i have done CCNA, can you please tell me which kind of profile i can get and what should i do further so that i can become a network administrator of a big network(routers and switches). Warm regards
adding additional devices
This is the config. One 3Com baseline 2250 10/100/100, one 3Com Superstack 3 baseline 10/100/100, one 8 port Linksys hub 10mb, one 5 port D-Link switch 10/100. I have tried both the Linksys and the D-Link devices to attach two PC. One is XP the other is 98 OS. No matter which hub or switch is used...
This is the config. One 3Com baseline 2250 10/100/100, one 3Com Superstack 3 baseline 10/100/100, one 8 port Linksys hub 10mb, one 5 port D-Link switch 10/100. I have tried both the Linksys and the D-Link devices to attach two PC. One is XP the other is 98 OS. No matter which hub or switch is used...
