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  • Ask the Experts
  • Pros and cons of integrated appliances

    Integrated appliances incorporate storage, processing and networking into one single product. But are they always a good choice?

  • Provisioning IT services with the cloud

    Using public cloud services requires diligent enterprise IT management of the cloud provider to make it a success.

  • Should you ever not use a firewall?

    There are many new network security devices on the market today. Expert Chris Partsenidis opines on whether these can replace firewalls.

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Expert Answers

  • Bandwidth allocation: How can I give a download limit for each user?

    To manage bandwidth, learn how to allocate download limits for each user in your network with policy settings on devices, our administration expert advises.

  • CCVP certification: Job market availability for unified communications

    Are there opportunities in the job market for Cisco Certified Voice Professionals (CCVP)? Our certification expert explains where you can apply this voice specialty and what your salary increases t...

  • Can neighboring 802.11n and 802.11g networks avoid coexistence problems?

    After an 802.11n migration, our wireless networking expert explains how to avoid coexistence problems with neighboring businesses that still use 802.11g.

  • Creating a wireless bridge to connect clients distant from APs

    Learn how to use one Wi-Fi module for creating a wireless bridge in order to connect clients that are distant from your access points (APs), in this expert response.

  • What is a GRE tunnel and how does it differ from an IPsec tunnel?

    Learn the difference between a GRE tunnel and IPsec tunnel in this Ask the Expert response.

  • Can 802.11n clients turn off radios to conserve battery life?

    Learn about the wireless 802.11n standard's power save features that can manage your Wi-Fi clients to conserve batteries.

  • How do VPN concentrators and network access servers (NAS) differ?

    Find out if there's a difference between a virtual private network (VPN) concentrator and a network access server (NAS) in this explanation from our network security expert, Puneet Mehta.

  • What keeps unauthorized users from accessing my IP address/Internet?

    Our network security expert explains how to keep unauthorized users from accessing your router's IP address for Internet access in this advice explaining how proxy servers can solve client control ...

  • Troubleshooting VLANs: How to monitor 802.1q tagged traffic

    When troubleshooting a virtual LAN (VLAN), learn how to monitor 802.1q tagged traffic within a network in this advice from our routing and switching expert.

  • What is the difference between packet fragmentation in IPv4 and IPv6?

    In this Q&A, our IPv6 expert explains how packet fragmentation differs in IPv6 compared to IPv4.

  • What VLAN management software supports multiple vendor platforms?

    Our network administration expert shows you which VLAN network management configuration and automation software supports multiple vendors and platforms, in this expert response.

  • Network bandwidth calculators: What will be my WAN's link speed?

    Use this recommended bandwidth calculator to calculate network latency and your WAN's link speed. Our network administration expert says this tool can simulate 1,000 users in your environment.

  • How to upgrade Windows Server 2003 to Server 2008

    Use these resources recommended by our network administration expert to upgrade from Windows Server 2003 to Windows Server 2008, in this expert response.

  • Which OSI layers are network managers responsible for?

    Learn which layers of the OSI model network managers should be responsible for. Our expert, Lindi Horton, explains where to focus your manual operations, especially regarding automated operation ta...

  • How a TV station tower will affect your wireless network

    Learn how to normalize the effects a TV station tower might have on your wireless network in this expert response explaining radio frequencies.

  • CCNA exam preparation: How to take tests faster

    To prepare for your Cisco Certified Networking Administrator (CCNA) certification exam, use these time-saving techniques to speed up your test-taking so that you don't run out of time.

  • Calculating subnets for IP addresses in IPv6

    Understand how subnetting in IPv6 differs from that of IPv4 and what you need to do in order to calculate the subnet of an IP address in IP version 6.

  • How to calculate subnet masks in IPv6

    Find out from our IPv6 (Internet Protocol Version 6) expert whether or not calculating a subnet mask in IPv6 is different than calculating a subnet mask in IPv4.

  • IP addressing in IPv6

    Understand the differences between network IP addressing in IPv6 and IPv4. Our expert, Silvia Hagen, explains the advantages and disadvantages of calculating IP addresses for each version.

  • What environmental factors cause switch connectivity to fail?

    If the power on your network's switch is fine, but the connectivity is not, ask yourself these questions posed by our switching expert to troubleshoot for environmental issues that may be causing t...

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