Lectures notes for 2010 - KTH
Lectures notes for 2010 - KTH Lectures notes for 2010 - KTH
Another examine in MX RR format: MX information > set querytype=MX > kth.se … kth.se preference = 0, mail exchanger = mail1.kth.se kth.se nameserver = kth.se kth.se nameserver = nic.lth.se kth.se nameserver = ns.kth.se mail1.kth.se internet address = 130.237.32.62 kth.se internet address = 130.237.72.201 nic.lth.se internet address = 130.235.20.3 ns.kth.se internet address = 130.237.72.200 1D IN MX 10 xxx.e.kth.se. 1D IN MX 20 yyy.e.kth.se. Maguire MX information 4: 56 of 74 maguire@kth.se 2010.03.21 Internetworking/Internetteknik
How to give your host a name? Host names and info see RFC 1178: Choosing a Name for Your Computer Internet Addresses: A second address for your host? • to have multiple addresses for you computer, see section on “ifconfig” Hostinfo (HINFO) > set querytype=HINFO > kth.se … kth.se CPU = sun-4/60 OS = unix Entry owner clas TTL RR type value comment xxxx 1D IN HINFO "PC" "FLINUX" ; “CPU” “OS” 1D IN A 130.237.x.y Maguire Host names and info 4: 57 of 74 maguire@kth.se 2010.03.21 Internetworking/Internetteknik
- Page 237 and 238: User Datagram Protocol (UDP) • Da
- Page 239 and 240: UDP Checksum and Pseudo-Header •
- Page 241 and 242: Port numbers in three groups Range
- Page 243 and 244: Fragmentation Required If datagram
- Page 245 and 246: • on a BSDI system: • each of t
- Page 247 and 248: With an even larger UDP packet I re
- Page 249 and 250: Datagram truncation What if the app
- Page 251 and 252: Learning about Socket programming F
- Page 253 and 254: UDP server design Stevens, Vol, 1,
- Page 255 and 256: Changed the client Changing the fol
- Page 257 and 258: if (!(proto = getprotobyname("raw")
- Page 259 and 260: ICMP Source Quench Error Since UDP
- Page 261 and 262: No error control Since UDP has no e
- Page 263 and 264: BOOTP continued When a request is s
- Page 265 and 266: DHCP: Dynamic Host Configuration Pr
- Page 267 and 268: • Message - used by a server to p
- Page 269 and 270: DHCP’s importance • allows reus
- Page 271 and 272: Example of dhcpd.conf ### Managed b
- Page 273 and 274: Trivial File Transfer Procotol (TFT
- Page 275 and 276: Mapping names to IP addresses Host
- Page 277 and 278: Zones A zone is a subtree of the DN
- Page 279 and 280: (see Stevens, Vol. 1, figure 14.2,
- Page 281 and 282: Domain registrars Internet Corporat
- Page 283 and 284: Resource Records (RR) See Stevens,
- Page 285 and 286: Network names Conventions: • it.k
- Page 287: Example: $ORIGIN it.kth.se. @ 1D IN
- Page 291 and 292: Configuring DNS • Configuring the
- Page 293 and 294: Load leveling [1] For example, f.ro
- Page 295 and 296: Where is f.root-servers.net ? trace
- Page 297 and 298: Dynamic Domain Name System (DDNS) R
- Page 299 and 300: Attacks upon DNS • Denial of serv
- Page 301 and 302: DNS performance - top 100 From www.
- Page 303 and 304: Web performance - continued Using P
- Page 305 and 306: This lecture we have discussed: •
- Page 307 and 308: IK1550 Internetworking/Internettekn
- Page 309 and 310: Transport layer protocols • User
- Page 311 and 312: Applications which use TCP Lots of
- Page 313 and 314: TCP header continued Reliability is
- Page 315 and 316: time client SYN, seq=x SYN, seq=y,
- Page 317 and 318: client active close ACKs from clien
- Page 319 and 320: Maximum Segment Size • The Maximu
- Page 321 and 322: Window size Increasing window size
- Page 323 and 324: Silly Window Syndrome If receiver a
- Page 325 and 326: Disabling the Nagle Algorithm But s
- Page 327 and 328: Resulting bulk data flow Every segm
- Page 329 and 330: Congestion Avoidance So far we have
- Page 331 and 332: Slow start In 1989, Van Jacobson in
- Page 333 and 334: Round-Trip Time Measurement Fundame
- Page 335 and 336: Congestion Avoidance Algorithm Slow
- Page 337 and 338: Per-Route Metrics Newer TCPs keeps
Another examine in MX RR <strong>for</strong>mat:<br />
MX in<strong>for</strong>mation<br />
> set querytype=MX<br />
> kth.se<br />
…<br />
kth.se<br />
preference = 0, mail exchanger = mail1.kth.se<br />
kth.se<br />
nameserver = kth.se<br />
kth.se<br />
nameserver = nic.lth.se<br />
kth.se<br />
nameserver = ns.kth.se<br />
mail1.kth.se internet address = 130.237.32.62<br />
kth.se internet address = 130.237.72.201<br />
nic.lth.se internet address = 130.235.20.3<br />
ns.kth.se internet address = 130.237.72.200<br />
1D IN MX 10 xxx.e.kth.se.<br />
1D IN MX 20 yyy.e.kth.se.<br />
Maguire MX in<strong>for</strong>mation 4: 56 of 74<br />
maguire@kth.se <strong>2010</strong>.03.21 Internetworking/Internetteknik
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