Notes, abstracts, papers, exams and problems of Technology

1. Refer to the exhibit. The network administrator needs to setup Switch1 for remote access from HostA. Theshow ip interface brief is issued on Router1 and the show interfaces trunk command is issued on theSwitch1 to verify the current status. The administrator applies the additional configuration shown in theexhibit to Switch1. However, the telnet from HostA fails. What additional commands need to be appliedto the switch?
Switch(config)# interface vlan 10
Switch(config-if)# ip address 10.1.1.250 255.255.255.0
Switch(config-if)# no shutdown
Switch(config-if)# ip default-gateway 10.1.10.254

2. Refer to the exhibit. On the basis of the configuration shown, how will an Ethernet frame on port GigabitEthernet0/1 be modified?
802.1Q encapsulation inserts a 4-byte tag field into the original Ethernet frame between the source address and type/length fields and recomputes the frame check sequence (FCS) on the modified frame.

WHY PEOPLE PREFER COMPUTERS - computers work faster than the persons , find information quickly, can store information as well, never get tires. DATA TYPES: numeric - 2 types \ integere and real. text: - one string. graphics: -pictures. Date. Sound.    INPUT DEVICES: concept keyboards: a concept keyboard is a flat board with a grid programmable keys on its surface. they are used with young children in promary school. Light pen: a light pen is a small pen shaped wand, which contains light sensors. when you press the pen against the screen's surface, to choose objects are commands. then sends a signal to the computer which then works out the light pen's location. it doesnt need a special screen.

Atoms are the basis for everything in the Universe. The protons and neutrons are always in the centre of the atom. Scientists call the centre of the atom nucleus. The electrons are always found whizzing around the nucleus.

There are two types of electrical charge:positive and negative. Opposite charges attract.Like charges repel.

Electricity is lows powers mosth things around us. Electricity is like water in the way it works. Water flows through rivers and pipes and will stop if it cannot pass.

Electricity is the same, it flows around the ciruit from one end of the

//GPCA76CS JOB MSGCLASS=X,CLASS=C,NOTIFY=GPCA76 00010034 //* 

//* JCL PARA COMPILAR PROGRAMAS CICS *

//* ALTERAR CONFORME SEGUE: *

//* GPCAP760 --> TROCAR PELO SEU USUARIO * 

//* NAME=XXXXXXX --> COLOQUE O NOME DO PROGRAMA *

// JCLLIB ORDER=GP.LB.PROCLIB 

//CICSPGM EXEC DFHCICS1,NAME=PSCVINCL,INSTR='GPCA76'

//TRAN.SYSIN DD DSN=GP.GPCA76.COBLIB(GPCAP768),DISP=SHR

---------------------------------------------------------------------------------------------------

//GPCA76CD JOB CARLOS,MSGCLASS=X,CLASS=C,NOTIFY=GPCA76,TIME=(0,40)

//* JOB DE COMPILACAO DE PROGRAMA COBOL COM DB2 CICS *

// JCLLIB ORDER=GP.LB.PROCLIB

//COMPCIDB EXEC DFHCIDB2,NAME='GPCAP764',INSTR='GPCA76' MEMBRO

//BIND.SYSTSIN DD * DSN SYSTEM(DB2N) BIND PLAN(GPCAP764) MEM(GPCAP764) ACT(REP) ISOLATION(CS) - LIB('SYS2.DB2.DBRMLIB.DATA') END

----------------------------------------------------------------------------------------------------

all machines have in common:

- involve a kind of motion.

- involve a kind of force.

- make a job easier to do.

- need some kind of input to make them work.

- produce some kind of output.

OSPF
******************************************
Red directamente conectada 172.16.0.0/16
Router> en
Router#conf term
Router(config)# router ospf 1
Router(config-router)# network 172.16.0.0 0.0.255.255 area 0
Router(config-router)# network  ….   ….   area 0 /* si hay mas redes conectadas directamente
Router(config-router)# exit
Router(config) # …..

NOMBRE
********************************************
router> enable
router# configure terminal
router(config) hostname <nombre>
nombre(config)#

CONFIGURAR CONTRASEÑAS "ENABLE SECRET" Y "ENABLE PASSWORD"
**********************************************************
RouterA> enable
RouterA# configure terminal
RouterA(config)# enable secret contraseña * (configura contraseña Enable Secret)
RouterA(config)# enable password contraseña (configura contraseña Enable Password)

A 0-127
B 128-191
C 192-223
OSPF (Red directamente conectada 172.16.0.0/16)
************************************************************
Router> en
Router#conf term
Router(config)# router ospf 1
Router(config-router)# network 172.16.0.0 0.0.255.255 area 0
Router(config-router)# network .......... ........... area 0
Router(config-router)# exit
Router(config)#

EIGRP (Red directamente conectada 172.16.0.0/16)
************************************************************
Router> en
Router#conf term
Router(config)# router eigrp 50
Router(config-router)# network 172.16.0.0 0.0.255.255
Router(config-router)# network ..........
Router(config-router)# exit
Router(config)#

Estaticas (Red NO directamente conectada)
************************************************************
Router>en
Router#ip route 172.16.0.0 255.255.0.0 f0/1

#useradd nombredeusuario :: para crear usuarios

#passwd :: nombredelusuario

#groupadd :: nombredelgrupo :: (forma normal)

#groupadd -g 600 nombredelgrupo :: (guid sobre 650)

#userdel nombredelusuario :: para deletear usuarios

#groupdelnombredelgrupo :: borrar el grupo

#usermod -G nombredelgrupo nombredeusuario :: para asignar usuario a grupo.

opcion 2: editar archivo /etc/group -> grupo:x:600:usuarioqueseagregara

#nano /etc/shadow :: para poder ver los usuarios y poder bloquearlos

#passwd -l nombredeusuario :: para bloquear usuario

#passwd -u nombredeusuario :: para desbloquear usuario

#sudo passwd :: para cambiar la contraseña de root

# tail /etc/passwd :: paraver informacion de usuarios

#su nombredelotrousuario :: para iniciar sesion como el usuario que colocas

1 – MANUTENÇÃO DE SOFTWARE

• Modificação, falhas, defeitos, melhora o desempenho e adequa os novos requisitos
• Custo para modificacao

(Continue)