Lecture27
... A server does a passive open. A client does an active open The two parties have to agree upon on a set of parameters the starting numbers the two sides plan to use for their respective byte streams. Three-Way Handshake Connection termination is symmetric, each side has to close the connectio ...
... A server does a passive open. A client does an active open The two parties have to agree upon on a set of parameters the starting numbers the two sides plan to use for their respective byte streams. Three-Way Handshake Connection termination is symmetric, each side has to close the connectio ...
CSCI6268L20
... • IP is “best effort” – There is no tracking of packets – If something is dropped… oh well – If one fragment is dropped, many transport layer protocols (like TCP) will consider the whole thing lost and not ACK – This seems bad, but it’s one of the biggest successes of IP – UDP is IP with ports, so i ...
... • IP is “best effort” – There is no tracking of packets – If something is dropped… oh well – If one fragment is dropped, many transport layer protocols (like TCP) will consider the whole thing lost and not ACK – This seems bad, but it’s one of the biggest successes of IP – UDP is IP with ports, so i ...
distributed
... • Marshalling is the packing of procedure parameters into a message packet – the RPC stubs call type-specific procedure to marshal or unmarshal the parameters of an RPC • the client stub marshals the parameters into a message • the server stub unmarshals the parameters and uses them to invoke the se ...
... • Marshalling is the packing of procedure parameters into a message packet – the RPC stubs call type-specific procedure to marshal or unmarshal the parameters of an RPC • the client stub marshals the parameters into a message • the server stub unmarshals the parameters and uses them to invoke the se ...
Processes - William & Mary Computer Science
... • Marshalling is the packing of procedure parameters into a message packet – the RPC stubs call type-specific procedure to marshal or unmarshal the parameters of an RPC • the client stub marshals the parameters into a message • the server stub unmarshals the parameters and uses them to invoke the se ...
... • Marshalling is the packing of procedure parameters into a message packet – the RPC stubs call type-specific procedure to marshal or unmarshal the parameters of an RPC • the client stub marshals the parameters into a message • the server stub unmarshals the parameters and uses them to invoke the se ...
Computer Science 461 Midterm Exam March 15, 2006 1:30-2:50pm
... D have this size; suppose also that B and C send an ACK in response to each data packet. Suppose that all packets have TCP and IP headers, as well as a 20-byte link-layer header/trailer. Assume the combined data and ACK packets fully utilize the middle link in both directions and no congestion contr ...
... D have this size; suppose also that B and C send an ACK in response to each data packet. Suppose that all packets have TCP and IP headers, as well as a 20-byte link-layer header/trailer. Assume the combined data and ACK packets fully utilize the middle link in both directions and no congestion contr ...
EECS 700: Network Security
... – An IP packet can be as large as 65535 byte – Different hardware have different MTU: ethernet 1500, FDDI 4470 ...
... – An IP packet can be as large as 65535 byte – Different hardware have different MTU: ethernet 1500, FDDI 4470 ...
ch20
... The network layer protocol in the TCP/IP protocol suite is currently IPv4. Although IPv4 is well designed, data communication has evolved since the inception of IPv4 in the 1970s. IPv4 has some deficiencies that make it unsuitable for the fast-growing Internet. Topics discussed in this section: ...
... The network layer protocol in the TCP/IP protocol suite is currently IPv4. Although IPv4 is well designed, data communication has evolved since the inception of IPv4 in the 1970s. IPv4 has some deficiencies that make it unsuitable for the fast-growing Internet. Topics discussed in this section: ...
Lecture 3b - Anonymity in networks
... Key bit is sent over secure channel to exactly one other station To send a bit, each station XORs all key bits it sent or received, plus the bit it wants to send (if any) Makes multiple access collision channel Need anonymity-preserving multiple access protocol ...
... Key bit is sent over secure channel to exactly one other station To send a bit, each station XORs all key bits it sent or received, plus the bit it wants to send (if any) Makes multiple access collision channel Need anonymity-preserving multiple access protocol ...
CSCE 790: Computer Network Security
... Client wishing to use new features can use EHLO, instead of HELO, to initiate session Server lists extended commands in the 250 reply to EHLO command ...
... Client wishing to use new features can use EHLO, instead of HELO, to initiate session Server lists extended commands in the 250 reply to EHLO command ...
florida institue of technology
... B. Suppose that host A is connected to a router R1, R1 is connected to another router, R2, and R2 is connected to host B. Suppose that a TCP message that contains 900 bytes of data and 20 bytes of TCP header is passed to the IP code at host A for delivery to B. Show the Total length, Identification, ...
... B. Suppose that host A is connected to a router R1, R1 is connected to another router, R2, and R2 is connected to host B. Suppose that a TCP message that contains 900 bytes of data and 20 bytes of TCP header is passed to the IP code at host A for delivery to B. Show the Total length, Identification, ...
REMOTE LOGIN PROTOCOLS
... converts the characters back from NVT to the local client machine's format. Secure Shell (SSH) Protocol Secure Shell (SSH), another remote login protocol, is based on UNIX programs. SSH uses TCP for communications but is more powerful and flexible than TELNET and allows the user to more easily execu ...
... converts the characters back from NVT to the local client machine's format. Secure Shell (SSH) Protocol Secure Shell (SSH), another remote login protocol, is based on UNIX programs. SSH uses TCP for communications but is more powerful and flexible than TELNET and allows the user to more easily execu ...
The Transport Layer
... Multiplexing/Demultiplexing • Multiplexing: – Gather data from multiple processes, envelope data with header – Header has src port, dest port for multiplexing • Why not process id? ...
... Multiplexing/Demultiplexing • Multiplexing: – Gather data from multiple processes, envelope data with header – Header has src port, dest port for multiplexing • Why not process id? ...
Slides Topic 3
... networks designed by different vendors into a network of networks (the "Internet"). It was initially successful because it delivered a few basic services that everyone needs (file transfer, electronic mail, remote logon) across a very large number of client and server systems. Several computers in a ...
... networks designed by different vendors into a network of networks (the "Internet"). It was initially successful because it delivered a few basic services that everyone needs (file transfer, electronic mail, remote logon) across a very large number of client and server systems. Several computers in a ...
IP - The Internet Protocol
... • To determine the size of the fragments we recall that, since there are only 13 bits available for the fragment offset, the offset is given as a multiple of eight bytes. As a result, the first and second fragment have a size of 996 bytes (and not 1000 bytes). This number is chosen since 976 is the ...
... • To determine the size of the fragments we recall that, since there are only 13 bits available for the fragment offset, the offset is given as a multiple of eight bytes. As a result, the first and second fragment have a size of 996 bytes (and not 1000 bytes). This number is chosen since 976 is the ...
10_Tools_Troubleshooting
... operational status of your desktop computer and network connection. It does this by sending data between your computer and this remote NDT server. These tests will determine: • The slowest link in the end-to-end path (Dial-up modem to 10 Gbps Ethernet/OC-192) • The Ethernet duplex setting (full or h ...
... operational status of your desktop computer and network connection. It does this by sending data between your computer and this remote NDT server. These tests will determine: • The slowest link in the end-to-end path (Dial-up modem to 10 Gbps Ethernet/OC-192) • The Ethernet duplex setting (full or h ...
Document
... of long datagrams, if necessary, for transmission through small packet networks. • IP basically runs over any Media Access Control (MAC) protocol ...
... of long datagrams, if necessary, for transmission through small packet networks. • IP basically runs over any Media Access Control (MAC) protocol ...
Chapter 22 Distributed Applications
... • Transmits to proper destination host — Via SMTP transaction — Over one or more TCP connections to port 25 ...
... • Transmits to proper destination host — Via SMTP transaction — Over one or more TCP connections to port 25 ...
Client/Server and Intranet Computing
... • Clients and servers ship messages between objects. • May rely on an underlying message or RPC structure or be developed directly on top of object-oriented capabilities in the operating system • Success depends on standardization of the object mechanism, but competing models exist – COM, OLE, CORBA ...
... • Clients and servers ship messages between objects. • May rely on an underlying message or RPC structure or be developed directly on top of object-oriented capabilities in the operating system • Success depends on standardization of the object mechanism, but competing models exist – COM, OLE, CORBA ...
08-Application File
... and address in cache it will return the IP address. Note: addresses will time out in cache at an interval determined by the administrator (typically 2 days) • Otherwise a request will be made to a higher level server or a root server which may have to refer the request down to its sub-domain servers ...
... and address in cache it will return the IP address. Note: addresses will time out in cache at an interval determined by the administrator (typically 2 days) • Otherwise a request will be made to a higher level server or a root server which may have to refer the request down to its sub-domain servers ...
Internet Protocol (IP):
... Tells host that packet can’t be delivered for various reasons Dest subnet, host, protocol, port unavailable Don’t fragment (DF) Flag set, but needed to fragment ...
... Tells host that packet can’t be delivered for various reasons Dest subnet, host, protocol, port unavailable Don’t fragment (DF) Flag set, but needed to fragment ...
17.Networks.Chapman
... Allows an HTTP server to communicate with other resources (e.g. databases) to generate Web pages dynamically ...
... Allows an HTTP server to communicate with other resources (e.g. databases) to generate Web pages dynamically ...
Switching
... - Will amplify any signal - Can change your low-level transmission protocol w/o replacing repeaters ...
... - Will amplify any signal - Can change your low-level transmission protocol w/o replacing repeaters ...