Index_U

U

UDP (User Datagram Protocol)

ARP problems, 322323

channels, 277295

connectionless nature of, 146, 151

defined, 145, 322

disadvantages, 146, 322323

dropped datagrams, 322

errors, 159

IP_RECEIVE_BROADCAST option, 305306

IPSec, 310

locks, 322

maximum packet size , 145

message orientation, 145

multicasting, 166170

peer determination, 308310

ReceiveFrom method, 157159

SendTo method, 155157

spoofed addresses, 310

UdpClient class, 111112, 180

unicast addresses, 128129, 131132

Unicode, 43

Uniform Resource Identifiers. See URIs (Uniform Resource Identifiers)

Uniform Resource Locators. See URLs (Uniform Resource Locators)

Uniform Resource Names . See URNs (Uniform Resource Names)

Untrusted zone, 302

URIs (Uniform Resource Identifiers)

absolute, 90

authority component, 8889

canonicalization of, 9192

casing names, 88

comparing, 9293

cost of Uri objects, 97

# (crosshatch), 89

custom parsing, 96

URIs (Uniform Resource Identifiers), continued

defined, 18, 87

exceptions generated by, 94

file extensions in, 89

file resolution support, 116

file schemes, 93

fragments , 89

guidelines for System.Uri, 9697

host names, parsing, 96

mailto schemes, 93

methods for operations with, 119121

namespace for, 18

path components , 89

port specification, 89

purpose of, 87

query strings, 8990

reference, passing by, 97

relative, 90

remote procedure calls with, 97

resolving with WebRequest, 117

retrieving multiple, 228

schemes, 87, 9396

scheme-specific parts , 87, 93

syntax of, 8788

System.Uri class, 9098

ToString method, 92

Uri constructor, 9091

Uri namespace, 18

URLs as subset of, 90

URNs as subset of, 90

URLs (Uniform Resource Locators), 90. See also URIs (Uniform Resource Identifiers)

URNs (Uniform Resource Names), 90. See also URIs (Uniform Resource Identifiers)

User Datagram Protocol. See UDP (User Datagram Protocol)

User policy level, 299300

UserAgent property, 205