Firewalls
... prevent denial of service attacks: SYN flooding: attacker establishes many bogus TCP connections, no resources left for “real” connections prevent illegal modification/access of internal data. e.g., attacker replaces CIA’s homepage with something else allow only authorized access to inside netwo ...
... prevent denial of service attacks: SYN flooding: attacker establishes many bogus TCP connections, no resources left for “real” connections prevent illegal modification/access of internal data. e.g., attacker replaces CIA’s homepage with something else allow only authorized access to inside netwo ...
Layer and Subnetting1
... – Connection and path selection between two end system across networks. ...
... – Connection and path selection between two end system across networks. ...
Document
... A sink tree does not contain any loops, so each packet will be delivered within a finite and bounded number of hops. Links and routers can go down and come back up during operation, so different routers may have different ideas about the current topology. One of the issue is whether each router has ...
... A sink tree does not contain any loops, so each packet will be delivered within a finite and bounded number of hops. Links and routers can go down and come back up during operation, so different routers may have different ideas about the current topology. One of the issue is whether each router has ...
Chapter 11 ATM - National Chi Nan University
... — Used by two end users without network intervention to establish and release user to user VCC ...
... — Used by two end users without network intervention to establish and release user to user VCC ...
chapter5
... (a) A broadcasts ROUTE REQUEST (only B and D are in the range of A's broadcast). (b) B and D receive packet; since they do not know how to get to I, they further broadcast the packet and memorize how to get to A (backward arrow). (c) New receivers of packet are C, F, and G, and they broadcast the pa ...
... (a) A broadcasts ROUTE REQUEST (only B and D are in the range of A's broadcast). (b) B and D receive packet; since they do not know how to get to I, they further broadcast the packet and memorize how to get to A (backward arrow). (c) New receivers of packet are C, F, and G, and they broadcast the pa ...
PPT - Pages
... – Tunneling adds (of course) processing overhead – Tunneling increases the packet length, which may cause fragmentation • BIG hit in performance in most systems • Tunneling in effect reduces the MTU of the path, but endpoints often do not know this ...
... – Tunneling adds (of course) processing overhead – Tunneling increases the packet length, which may cause fragmentation • BIG hit in performance in most systems • Tunneling in effect reduces the MTU of the path, but endpoints often do not know this ...
MOD02_SC
... • Bridges use “store and forward” to ensure no errors are passed onto another segment. • Bridges do not pass errors or collisions through to another segment. ...
... • Bridges use “store and forward” to ensure no errors are passed onto another segment. • Bridges do not pass errors or collisions through to another segment. ...
ECE544Lec7QoSDR06
... Differences with RSVP • No need for reservations: just mark packets • Packet marking can be done at administrative boundaries before injecting packets into network • Significant savings in signaling, much simpler overall ...
... Differences with RSVP • No need for reservations: just mark packets • Packet marking can be done at administrative boundaries before injecting packets into network • Significant savings in signaling, much simpler overall ...
Label Switched Path (LSP) Dynamical Provisioning Performance
... • Measuring these metrics is important for applications scheduling. – Longer LSP setup delay will incur higher overhead for the requesting application. ...
... • Measuring these metrics is important for applications scheduling. – Longer LSP setup delay will incur higher overhead for the requesting application. ...
ppt - Carnegie Mellon University
... • Loops are detected as follows: • When AS gets route, check if AS already in path • If yes, reject route • If no, add self and (possibly) advertise route further ...
... • Loops are detected as follows: • When AS gets route, check if AS already in path • If yes, reject route • If no, add self and (possibly) advertise route further ...
SmartClass™ Ethernet
... different sources of traffic from one Ethernet port. Technicians can configure eight independent traffic flows with individual source and destination media access control (MAC) or IP addresses, tagged with configurable VLAN or Q-in-Q identifiers, and set with a user-configurable frame size and a tra ...
... different sources of traffic from one Ethernet port. Technicians can configure eight independent traffic flows with individual source and destination media access control (MAC) or IP addresses, tagged with configurable VLAN or Q-in-Q identifiers, and set with a user-configurable frame size and a tra ...
Chapter 13 slides
... another; typically 2-4 ports; uses MAC addresses to direct the message on an incoming port to an outgoing port; corresponds to layer 1 (physical) of the OSI model Similar functionality to a bridge but supports several ports (typically 432); provides expanded capabilities for dynamically configuring ...
... another; typically 2-4 ports; uses MAC addresses to direct the message on an incoming port to an outgoing port; corresponds to layer 1 (physical) of the OSI model Similar functionality to a bridge but supports several ports (typically 432); provides expanded capabilities for dynamically configuring ...
ppt
... » Packets carry a “tag” (virtual circuit ID) that determines the next hop » Path determined at call setup time & remains fixed throughout call » Routers maintain per-call path state ...
... » Packets carry a “tag” (virtual circuit ID) that determines the next hop » Path determined at call setup time & remains fixed throughout call » Routers maintain per-call path state ...
Controlling IP Spoofing via Inter-Domain Packet Filters
... – Effectiveness of IDPFs in protecting ASes against spoofing attacks – VictimFraction(1), immunity to all spoofing attacks ...
... – Effectiveness of IDPFs in protecting ASes against spoofing attacks – VictimFraction(1), immunity to all spoofing attacks ...
Ch01
... • Path is A-4 circuit, internal switching through 4, 4-5 channel, internal switching through 5, 5-6 channel, internal switching through 6, 6-E circuit • Generally, full duplex (data in both directions) ...
... • Path is A-4 circuit, internal switching through 4, 4-5 channel, internal switching through 5, 5-6 channel, internal switching through 6, 6-E circuit • Generally, full duplex (data in both directions) ...
Part I: Introduction - Computer Science and Engineering
... • A uses ARP to get R’s physical layer address for 111.111.111.110 • A creates Ethernet frame with R’s physical address as dest, Ethernet frame contains A-to-B IP datagram • A’s data link layer sends Ethernet frame • R’s data link layer receives Ethernet frame • R removes IP datagram from Ethernet f ...
... • A uses ARP to get R’s physical layer address for 111.111.111.110 • A creates Ethernet frame with R’s physical address as dest, Ethernet frame contains A-to-B IP datagram • A’s data link layer sends Ethernet frame • R’s data link layer receives Ethernet frame • R removes IP datagram from Ethernet f ...
Accompanying slides for Project 5
... Specify the TCP/IP properties for the Tablet in the same way as for Jornada for ad-hoc network Specify an Ip address based on your group Set Subnet Mask to 255.255.255.0 Set Gateway to 192.168.1.254 ...
... Specify the TCP/IP properties for the Tablet in the same way as for Jornada for ad-hoc network Specify an Ip address based on your group Set Subnet Mask to 255.255.255.0 Set Gateway to 192.168.1.254 ...
Adventures in Computer Security - Applied Crypto Group at Stanford
... Only allow packets from known hosts Check for reverse path • Block packets from IP addr X at the firewall if there is no reverse connection going out to addr X ...
... Only allow packets from known hosts Check for reverse path • Block packets from IP addr X at the firewall if there is no reverse connection going out to addr X ...
09-IP_pkts
... • Higher level protocols must make up for shortcomings • Reliably delivering ordered sequence of bytes TCP ...
... • Higher level protocols must make up for shortcomings • Reliably delivering ordered sequence of bytes TCP ...
No Slide Title
... The DS-1 signal carries 24 DS-0 channels, but its rate is more than 24 times 64 kb/s. The additional bits are used to accommodate DS-0 channels with rates that deviate from the nominal 64 because the signals are generated using clocks that are not perfectly synchronized. Since the 1980s the tran ...
... The DS-1 signal carries 24 DS-0 channels, but its rate is more than 24 times 64 kb/s. The additional bits are used to accommodate DS-0 channels with rates that deviate from the nominal 64 because the signals are generated using clocks that are not perfectly synchronized. Since the 1980s the tran ...
8 bits
... A routing table maintained at each node, indicating the best known distance and next hop to get there Calculate w(u,v), is the cost associated with edge uv Calculate d(u), the distance of node u from a root node For each uv, find minimum d(u,v) Repeat n-1 times for n-nodes ...
... A routing table maintained at each node, indicating the best known distance and next hop to get there Calculate w(u,v), is the cost associated with edge uv Calculate d(u), the distance of node u from a root node For each uv, find minimum d(u,v) Repeat n-1 times for n-nodes ...