File Systems
... Communication cost – How long does it take to send a message from site A to site B? Reliability – If a link or a site in the system fails, can the remaining sites still communicate with each other? ...
... Communication cost – How long does it take to send a message from site A to site B? Reliability – If a link or a site in the system fails, can the remaining sites still communicate with each other? ...
IP LAB: Current Architecture
... • How to access internal Proxy from outside world (New TCP Proxy protocol on new port + port forwarding)? • More network traffic, evtl. More hops • GPRS problem not resolved (MobileIP) ...
... • How to access internal Proxy from outside world (New TCP Proxy protocol on new port + port forwarding)? • More network traffic, evtl. More hops • GPRS problem not resolved (MobileIP) ...
GENI Networking Demos - Καλώς Ήλθατε στο
... Distance Vector Routing Description Each router reports a list of (directly or indirectly) reachable destinations and the routing metric (“distance vector”) to its neighbors Each router updates its internal tables according to the information received. If a shorter distance to a destination is ...
... Distance Vector Routing Description Each router reports a list of (directly or indirectly) reachable destinations and the routing metric (“distance vector”) to its neighbors Each router updates its internal tables according to the information received. If a shorter distance to a destination is ...
4 TCP/IP Fundamentals 4.04 TCP/IP Configuration Concepts
... Subnet Mask: When looking at a subnet mask, if there is a 255 in an octet, then the corresponding octet in the IP address is part of the network ID. For example, if I had an IP address of 192.168.1.15 and a subnet mask of 255.255.255.0, the first three octets would make up the network ID and the las ...
... Subnet Mask: When looking at a subnet mask, if there is a 255 in an octet, then the corresponding octet in the IP address is part of the network ID. For example, if I had an IP address of 192.168.1.15 and a subnet mask of 255.255.255.0, the first three octets would make up the network ID and the las ...
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... • End-‐host network stack (28,000 LOC) – Linux kernel module – BSD sockets with AF_SERVAL protocol family – AF_INET sockets can be accessed simultaneously ...
... • End-‐host network stack (28,000 LOC) – Linux kernel module – BSD sockets with AF_SERVAL protocol family – AF_INET sockets can be accessed simultaneously ...
Lecture 2
... Congestion control (or lack there of) (http://www.youtube.com/watch?v=RjrEQaG5jPM • Congestion Control: The server should send data as fast as possible, but not too fast • TCP provides these features (services), while UDP does not 3. Network layer (could be called the routing layer, but it isn’t) • ...
... Congestion control (or lack there of) (http://www.youtube.com/watch?v=RjrEQaG5jPM • Congestion Control: The server should send data as fast as possible, but not too fast • TCP provides these features (services), while UDP does not 3. Network layer (could be called the routing layer, but it isn’t) • ...
ppt
... the other computer and port (e.g., over TCP/IP) - That is, remote IP and port are attached to the packets ...
... the other computer and port (e.g., over TCP/IP) - That is, remote IP and port are attached to the packets ...
iR1200 Modem – Installing Data Applet
... property of their respective owners. All trademarks, service marks and trade names are protected by state, federal and/or international trademark laws. All rights reserved. RFM-4004-5015 Rev 1 ...
... property of their respective owners. All trademarks, service marks and trade names are protected by state, federal and/or international trademark laws. All rights reserved. RFM-4004-5015 Rev 1 ...
Application Layer
... • Developed by ITU-T for use in WANs • Widely used especially in Europe – Seldom used in North America ...
... • Developed by ITU-T for use in WANs • Widely used especially in Europe – Seldom used in North America ...
Chapter 2 - William Stallings, Data and Computer
... – PDUs may go through different paths in the network and may arrive at the destination not in order – Protocol ensures that data received in the original order it was sent ...
... – PDUs may go through different paths in the network and may arrive at the destination not in order – Protocol ensures that data received in the original order it was sent ...
IC30304pt2
... • SMURF: drop most external ICMP traffic at boundary firewall. – There are other good reasons to do this: ICMP can be used as tool by hacker to investigate your network… ...
... • SMURF: drop most external ICMP traffic at boundary firewall. – There are other good reasons to do this: ICMP can be used as tool by hacker to investigate your network… ...
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... Because the frames themselves contain no information about where they should go, the setup phase needs to take care of this task, and also configure (reserve) any resources needed for the communication so that the illusion of a dedicated link is provided. The teardown phase is needed to release any ...
... Because the frames themselves contain no information about where they should go, the setup phase needs to take care of this task, and also configure (reserve) any resources needed for the communication so that the illusion of a dedicated link is provided. The teardown phase is needed to release any ...
Computer Networks and the Internet
... Queuing delay and packet loss. Many packets can arrive at a packet switch roughly at the same time. If these packets need to be forwarded on the same outbound link, all but one will have to “queue,” that is, wait to be transmitted. This waiting introduces a queuing delay. Furthermore, if the queue o ...
... Queuing delay and packet loss. Many packets can arrive at a packet switch roughly at the same time. If these packets need to be forwarded on the same outbound link, all but one will have to “queue,” that is, wait to be transmitted. This waiting introduces a queuing delay. Furthermore, if the queue o ...
ppt - BNRG
... – Router with list of access control rules – Router checks each received packet against security rules to decide to forward or drop it – Each rule specifies which packets it applies to based on a packet’s header fields » Specify source and destination IP addrs, port numbers, and protocol names, or w ...
... – Router with list of access control rules – Router checks each received packet against security rules to decide to forward or drop it – Each rule specifies which packets it applies to based on a packet’s header fields » Specify source and destination IP addrs, port numbers, and protocol names, or w ...
Admissible traffic load of real time class of service for inter
... MM L-M Vlow Low AF4x 100xx0* ...
... MM L-M Vlow Low AF4x 100xx0* ...
Networks and Network Security - Nicolas T. COURTOIS` research in
... • To make it really work to hijack the connection completely and keep it active for unlimited time, MUST be combined with ARP poisoning OR routing/MITM attacks ...
... • To make it really work to hijack the connection completely and keep it active for unlimited time, MUST be combined with ARP poisoning OR routing/MITM attacks ...
Re-architecting Congestion Control for Consistent High Performance
... In the roughly 25 years since its deployment, TCP’s congestion control architecture has been notorious for degraded performance. TCP performs poorly on lossy links, penalizes high-RTT flows, underutilizes high bandwidth-delay product (BDP) connections, cannot handle rapidly changing networks, can co ...
... In the roughly 25 years since its deployment, TCP’s congestion control architecture has been notorious for degraded performance. TCP performs poorly on lossy links, penalizes high-RTT flows, underutilizes high bandwidth-delay product (BDP) connections, cannot handle rapidly changing networks, can co ...
History of Data Compression
... Transparent Data Mode even if both peers have the capability. Packet Mode (enabled/disabled). The support of multiple packets as a stream of data requires each V.44 data compression peer to have a history buffer of a negotiated size. A history buffer is not required when compressing one packet at a ...
... Transparent Data Mode even if both peers have the capability. Packet Mode (enabled/disabled). The support of multiple packets as a stream of data requires each V.44 data compression peer to have a history buffer of a negotiated size. A history buffer is not required when compressing one packet at a ...
Chapter 7 Packet-Switching Networks
... Route determined by table lookup Routing decision involves finding next hop in route to given destination Routing table has an entry for each destination specifying output port that leads to next hop Size of table becomes impractical for very large number of destinations ...
... Route determined by table lookup Routing decision involves finding next hop in route to given destination Routing table has an entry for each destination specifying output port that leads to next hop Size of table becomes impractical for very large number of destinations ...