How can you tell time with your finger?

Question

how does it work?

Answer 1

I use my finger to move the sleeve away from the face of my watch, that's how.

Answer 2

With regards to sunlight ... it can be very difficult.

Answer 3

you have to know north and point your finger at the ground. and then use your finger like a sun dial... it would be easier to use your whole self though...

Answer 4

dip it in poison then it will melt in the right direction

Answer 5

Finger protocol

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The five-layer TCP/IP model

5. Application layer

DHCP · DNS · FTP · Gopher · HTTP · IMAP4 · IRC · NNTP · XMPP · POP3 · RTP · SIP · SMTP · SNMP · SSH · TELNET · RPC · RTCP · RTSP · TLS (and SSL) · SDP · SOAP · GTP · STUN · NTP · (more)



4. Transport layer

TCP · UDP · DCCP · SCTP · RSVP · ECN · (more)

3. Network/internet layer

IP (IPv4 · IPv6) · OSPF · IS-IS · BGP · IPsec · ARP · RARP · RIP · ICMP · ICMPv6 · IGMP · (more)

2. Data link layer

802.11 (WLAN) · 802.16 · Wi-Fi · WiMAX · ATM · DTM · Token ring · Ethernet · FDDI · Frame Relay · GPRS · EVDO · HSPA · HDLC · PPP · PPTP · L2TP · ISDN · ARCnet · LLTD · (more)

1. Physical layer

Ethernet physical layer · RS-232 · SONET/SDH · G.709 · Optical fiber · Coaxial cable · Twisted pair · (more)

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In computer networking, the Name/Finger protocol and the Finger user information protocol are simple network protocols for the exchange of human-oriented status and user information.

Contents [hide]

1 Name/Finger protocol

2 Finger user information protocol

3 Security concerns

4 See also

5 External links



[edit] Name/Finger protocol

The Name/Finger protocol, written by David Zimmerman, is based on Request for comments document 742 (December 1977) as an interface to the name and finger programs that provide status reports on a particular computer system or a particular person at network sites. The finger program was written in 1971 by Les Earnest who created the program to solve the need of users who wanted information on other users of the network. Information on who is logged-in was useful to check the availability of a person to meet. This was probably the earliest form of Presence information technology that worked for remote users over a network.

Prior to the finger program, the only way to get this information was with a who program that showed IDs and terminal line numbers for logged-in users, and people used to run their fingers down the who list. Earnest named his program after this concept.[citation needed]

[edit] Finger user information protocol

Finger is based on the Transmission Control Protocol, using TCP port 79 decimal. The local host opens a TCP connection to a remote host on the Finger port. An RUIP (Remote User Information Program) becomes available on the remote end of the connection to process the request. The local host sends the RUIP a one line query based upon the Finger query specification, and waits for the RUIP to respond. The RUIP receives and processes the query, returns an answer, then initiates the close of the connection. The local host receives the answer and the close signal, then proceeds closing its end of the connection.

The Finger user information protocol is based on RFC 1288 (The Finger User Information Protocol, December 1991). Typically the server side of the protocol is implemented by a program fingerd (for finger daemon), while the client side is implemented by the name and finger programs which are supposed to return a friendly, human-oriented status report on either the system at the moment or a particular person in depth. There is no required format, and the protocol consists mostly of specifying a single command line. It is implemented on Unix, Unix-like systems and current versions of Windows.

The program would supply information such as whether a user is currently logged-on, e-mail address, full name etc. As well as standard user information, finger displays the contents of the .project and .plan files in the user's home directory. Often this file (maintained by the user) contains either useful information about the user's current activities, or alternatively all manner of humor.

[edit] Security concerns

Supplying such detailed information as e-mail addresses and full names was considered acceptable and convenient in the early days of the Internet, but later was considered questionable for privacy and security reasons. Finger information has been frequently used by crackers as a way to initiate a social engineering attack on a company's computer security system. By using a finger client to get a list of a company's employee names, email addresses, phone numbers, and so on, a cracker can telephone or email someone at a company requesting information while posing as another employee. The finger daemon has also had several exploitable security holes which crackers have used to break into systems. The Morris worm exploited an overflow vulnerability in fingerd (among others) to spread.

For these reasons, while finger was widely used during the early days of Internet, by the 1990s the vast majority of sites on the internet no longer offered the service. Notable exceptions include John Carmack and Justin Frankel, who until recently still updated their status information occasionally. In late 2005, John Carmack switched to using a blog, instead of his old .plan site.

[edit] See also

Morris worm

[edit] External links

RFC 742

RFC 1288

Mail from Les Earnest explaining the origin of finger

History of the Finger protocol by Rajiv Shah

Microsoft TechNet Finger article

[show]v • d • eUnix command line programs and builtins (more)



File system cat · chattr · cd · chmod · chown · chgrp · cksum · cmp · cp · du · df · file · fsck · fuser · ln · ls · lsattr · lsof · mkdir · mount · mv · pwd · rm · rmdir · split · touch



Processes at · chroot · cron · exit · kill · killall · nice · pgrep · pidof · pkill · ps · pstree · sleep · time · top · wait · watch



User environment env · finger · id · logname · mesg · passwd · su · sudo · uname · uptime · w · wall · who · whoami · write



Text processing awk · comm · cut · ed · ex · fmt · head · iconv · join · less · more · paste · sed · sort · tac · tail · tr · uniq · wc · xargs



Shell programming alias · basename · echo · expr · false · printf · test · true · unset



Networking inetd · netstat · ping · rlogin · nc · traceroute



Searching find · grep · strings



Miscellaneous banner · bc · cal · clear · date · dd · lp · man · size · tee · yes



[show]v • d • eWindows command line programs and builtins (more)



File system

(basic) attrib · cd · chdir · copy · del · deltree · dir · erase · format · md · mkdir · move · rd · rename · ren · rmdir · robocopy · type · xcopy



File system

(advanced) assoc · cacls · chkdsk · chkntfs · comp · compact · convert · defrag · diskcomp · diskcopy · fc · ftype · label · recover · reg · regsvr32 · replace · subst · tree · verify · vol



Processes at · exit · kill · schtasks · start · taskkill · tasklist · tlist



User environment append · chcp · color · date · finger · graftabl · mode · path · popd · pushd · runas · set · setx · time · title · ver · whoami



Text processing edit · edlin · more · sort



Shell programming break · call · cmd · command · cscript · doskey · echo · endlocal · for · goto · if · pause · powershell · prompt · rem · setlocal · shift · forfiles · choice



Networking arp · ftp · ipconfig · net · netsh · netstat · ping · telnet · tftp · tracert



Searching find · findstr



Miscellaneous cls · help · print · debug · exe2bin



Retrieved from "http://en.wikipedia.org/wiki/Finger_pro...

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Finger protocol

From Wikipedia, the free encyclopedia

• Learn more about using Wikipedia for research •Jump to: navigation, search

The five-layer TCP/IP model

5. Application layer

DHCP · DNS · FTP · Gopher · HTTP · IMAP4 · IRC · NNTP · XMPP · POP3 · RTP · SIP · SMTP · SNMP · SSH · TELNET · RPC · RTCP · RTSP · TLS (and SSL) · SDP · SOAP · GTP · STUN · NTP · (more)



4. Transport layer

TCP · UDP · DCCP · SCTP · RSVP · ECN · (more)

3. Network/internet layer

IP (IPv4 · IPv6) · OSPF · IS-IS · BGP · IPsec · ARP · RARP · RIP · ICMP · ICMPv6 · IGMP · (more)

2. Data link layer

802.11 (WLAN) · 802.16 · Wi-Fi · WiMAX · ATM · DTM · Token ring · Ethernet · FDDI · Frame Relay · GPRS · EVDO · HSPA · HDLC · PPP · PPTP · L2TP · ISDN · ARCnet · LLTD · (more)

1. Physical layer

Ethernet physical layer · RS-232 · SONET/SDH · G.709 · Optical fiber · Coaxial cable · Twisted pair · (more)

This box: view • talk • edit

In computer networking, the Name/Finger protocol and the Finger user information protocol a

Answer 6

I dont know about fingers, but you can with the suns position. When the sun is directly in the middle of the sky it's noon. If you put your head up and it's not there, move it over, very slightly and every time you move it count up a number. When you stop thats what time it is. It takes practice, you gotta know how much to move your head, or maybe you just might know by looking.

Answer 7

point it towards a clock lol