Common IP VPN Questions
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IP VPN Service combines the traditional benefits of CPE-based VPNs -- security, and ATM - performance, with the benefits of IP - scalability, flexibility and improved economics. It's an ideal solution for networking needs - as either a primary network or as a fully provisioned, always-on, back-up network.
What is difference between IP Routing and MPLS VPN Routing?
In IP routing as an IP packet travels from one router to the next, every router makes it's own decision on where the packet should go. Each Router reads the IP packet header, and then runs a routing algorithm against the destination address to determine the next hop. Every router then chooses its own next hop for the packet based on the packets header and the routing algorithm.
What is MPLS-based IP VPN?
It is a IP VPN deploying MPLS technology to mark, classify, and monitor IP packets.
What is MPLS VPN ?
MPLS stands for "Multi-Protocol Label Switching" packet-switching VPN technology. After MPLS VPN is used, incoming data packets are assigned a "label" by a "label edge router (LER)". Such labeled packets are forwarded along a "label switch path (LSP)". Along a LSP, each "label switch router (LSR)" forwards a packet based solely on the instructions of the label.
What security performance is provided by MPLS IP VPN service?
With MPLS packet labeling method, which is similar to the processing of labels used in Frame Relay and ATM, security level of MPLS IP VPN service is compatible with ATM or FR security level. Users familiar with ATM and FR services can feel comfortable with MPLS security performance.
For security, Do I need to implement IP Sec if I use MPLS-based IP VPN service?
IP Sec is complementary to MPLS VPN service. It is an option to MPLS VPN customers who want to integrate additional security in there network.
What type of equipment is required to connect to MPLS VPN?
CPE routers are needed to connect user sites to MPLS VPN network. Any brand or model of CPE routers that support standard routing protocols can be used.
What is MPLS?
MPLS (Multi Protocol Label Switching) is a technology that overlays a label swapping approach to packet forwarding on top of the well-understood hop-by-hop routing mechanisms of IP networks. Fundamentally, it separates the "where" of packet forwarding from the "how". This technique brings a number of benefits meeting the needs of business and ecommerce with IP networks.
What is IP VPN Service?
VPN is an acronym for Virtual Private Network. An IP VPN Service offers exclusive and private interconnectivity using Internet protocol to computers or Local Area Networks (LANs) across the country.
What is the difference between PPPoE, Bridging, and Routing?
These are alternative methods of transporting Internet Protocol traffic between the ADSL exchange ("DSLAM") and the customer equipment. PPPoE is session-based, requiring username and password verification. In many respects PPPoE is similar to the traditional "Dialup Networking" approach. In Bridging and Routing mode the modem is "always on" and ready to transfer IP traffic. No username or password verification is necessary.
What is the difference between bridging and routing?
Broadcasts traverse the VPN -- this allows software that depends on LAN broadcasts such as Windows NetBIOS file sharing and network neighborhood browsing to work. Works with any protocol that can function over Ethernet, including IPv4, IPv6, Netware IPX, AppleTalk, etc. Works only with IPv4 in general, and IPv6 in cases where tun drivers on both ends of the connection support it explicitly.
How secure is IP VPN service?
A VPN by itself is an isolated entity and therefore has no possibility of outside intrusion. The security in case of interconnection with other networks will be the customer's responsibility.
What's the difference between VPN and a proxy server?
Proxy servers fulfill the second main purpose of a VPN: to make your network connections appear as if they originate on the proxy server as opposed to your computer. For example, Northwestern University Library offers access to a wide range of electronic resources, including periodical indexes, electronic journals, electronic texts, and statistical and numeric databases.
