Kamis, 25 April 2013

Jaringan Inter VLAN dengan Paket Tracert



Berikut adalah settingan dari Switch dan Router
Press RETURN to get started!
Switch>enable
Switch#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#vlan 10
Switch(config-vlan)#name A
Switch(config-vlan)#exit
Switch(config)#vlan 20
Switch(config-vlan)#name B
Switch(config-vlan)#exit
Switch(config)#interface fa0/2
Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 10
Switch(config-if)#exit
Switch(config)#interface fa0/3
Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 20
Switch(config-if)#exit
Switch(config)#interface fa0/1
Switch(config-if)#switchport mode trunk
Switch(config-if)#exit


*Router
Press RETURN to get started!
Router>enable
Router#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface fa0/0
Router(config-if)#no ip address
Router(config-if)#no shutdown
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
Router(config-if)#exit
Router(config)#interface fa0/0.10
Router(config-subif)#
%LINK-5-CHANGED: Interface FastEthernet0/0.10, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0.10, changed state to up
Router(config-subif)#encapsulation dot1q 10
Router(config-subif)#ip add 192.168.10.1 255.255.255.0
Router(config-subif)#exit
Router(config)#interface fa0/0.20
Router(config-subif)#
%LINK-5-CHANGED: Interface FastEthernet0/0.20, changed state to up
Router(config-subif)#encapsulation dot1q 20
Router(config-subif)#ip add 192.168.20.1 255.255.255.0
Router(config-subif)#exit
Router(config)#

Rabu, 20 Maret 2013

Perintah - Perintah Dasar "Show" Pada Router

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgWg3P6EUBoAeX8O6yoz7fGTLO01xVKSO3bAoznc0x1uUt1ttzsE2twypmtNEd9b2_wOgBV95HWkhZzh86sYZQH6ptMRwD8Ek-gzWB1e4zXwYXOxFmXoeh-1QnhHQQoNaW-f5qUk7HfA59A/s1600/g.bmp
Perintah penuh
Perintah singkat
Maksud Perintah
show running-config 
sh ru 
Menampilkan konfigurasi yang sedang berjalan di RAM. Termasuk host name, passwords, interface IP addresses, routing protocol yang aktif, DHCP dan konfigurasi NAT. Dapat dijalankan di EXEC mode. 
show startup-config 
Sh st
menampilkan isi file konfigurasi yang tersimpan di NVRAM
Show version
Sh v
menampilkan informasi tentang versi software yang sekarang sedang jalan lengkap dengan informasi hardware dan devicenya.
show ip protocols 
Sh ip p
memperlihatkan ip protokol routing yang telah dikonfigurasi dan
sedang berjalan
show ip route 
Sh ip ro
memperlihatkan konfigurasi routing
show interfaces 
Sh in
Menunjukkan interface yg berjalan di router
show ip interface brief 
Sh ip i b
Tinjauan semua antarmuka pada router
show protocols 
Sh prot
menampilkan status interface baik secara global maupun khusus dari protokol layer 3 yang terkonfigurasi.
show cdp neighbors 
Sh cd ne
Menampilkan ringkasan cdp perangkat tersambung
show sessions 
Sh se
memperlihatkan sesi yang ada sekarang
show ssh 
Sh ss
Menampilkan operasi status pengoperasian SSH
ping 
P
memastikan apakah suatu komputer tertentu dalam suatu jaringan atau internet itu ada dan terhubung.
Traceroute
tr
menunjukkan rute yang dilewati paket untuk mencapai tujuan. Ini dilakukan dengan mengirim pesan Internet Control Message Protocol (ICMP) Echo Request Ke tujuan dengan nilai Time to Live yang semakin meningkat.

Selasa, 19 Juni 2012

Evaluasi CCNA Discovery 1 - Chapter 7







Q.1 Why is IEEE 802.11 wireless technology able to transmit further distances than Bluetooth technology?
transmits at much lower frequencies
has higher power output
transmits at much higher frequencies
uses better encryption methods

Q.2 What are three advantages of wireless over wired technology? (Choose three.)
more secure
longer range
anytime, anywhere connectivity
easy and inexpensive to install
ease of using licensed air space
ease of adding additional devices

Q.3 What are two benefits of wireless networking over wired networking? (Choose two.)
speed
security
mobility
reduced installation time
allows users to share more resources
not susceptible to interference from other devices

Q.4 A technician has been asked to provide wireless connectivity to the wired Ethernet network of a building. Which three factors affect the number of access points needed? (Choose three.)
the size of the building
the number of solid interior walls in the building
the presence of microwave ovens in several offices
the encryption method used on the wireless network
the use of both Windows and Appletalk operating systems
the use of shortwave or infrared on the AP

Q.5 Why is security so important in wireless networks?
Wireless networks are typically slower than wired networks.
Televisions and other devices can interfere with wireless signals.
Wireless networks broadcast data over a medium that allows easy access.
Environmental factors such as thunderstorms can affect wireless networks.

Q.6 What does the Wi-Fi logo indicate about a wireless device?
IEEE has approved the device.
The device is interoperable with all other wireless standards.
The device is interoperable with other devices of the same standard that also display the Wi-Fi logo.
The device is backwards compatible with all previous wireless standards.

Q.7 Which statement is true concerning wireless bridges?
connects two networks with a wireless link
stationary device that connects to a wireless LAN
allows wireless clients to connect to a wired network
increases the strength of a wireless signal

Q.8 Which WLAN component is commonly referred to as an STA?
cell
antenna
access point
wireless bridge
wireless client

Q.9 Which statement is true concerning an ad-hoc wireless network?
created by connecting wireless clients in a peer-to-peer network
created by connecting wireless clients to a single, centralized AP
created by connecting multiple wireless basic service sets through a distribution system
created by connecting wireless clients to a wired network using an ISR

Q.10 Refer to the graphic. In the Wireless menu option of a Linksys integrated router, what does the Network Mode option Mixed mean?
The router supports encryption and authentication.
The router supports both wired and wireless connections.
The router supports 802.11b, 802.11g, and 802.11n devices.
The router supports connectivity through infrared and radio frequencies.

Q.11 Refer to the graphic. In the Wireless menu of a Linksys integrated router, what configuration option allows the presence of the access point to be known to nearby clients?
Network Mode
Network Name (SSID)
Radio Band
Wide Channel
Standard Channel
SSID Broadcast

Q.12 Which two statements about a service set identifier (SSID) are true? (Choose two.)
tells a wireless device to which WLAN it belongs
consists of a 32-character string and is not case sensitive
responsible for determining the signal strength
all wireless devices on the same WLAN must have the same SSID
used to encrypt data sent across the wireless network

Q.13 Which two statements characterize wireless network security? (Choose two.)
Wireless networks offer the same security features as wired networks.
Wardriving enhances security of wireless networks.
With SSID broadcast disabled, an attacker must know the SSID to connect.
Using the default IP address on an access point makes hacking easier.
An attacker needs physical access to at least one network device to launch an attack.

Q.14 What type of authentication does an access point use by default?
Open
PSK
WEP
EAP

Q.15 Which statement is true about open authentication when it is enabled on an access point?
requires no authentication
uses a 64-bit encryption algorithm
requires the use of an authentication server
requires a mutually agreed upon password

Q.16 What are two authentication methods that an access point could use? (Choose two.)
WEP
WPA
EAP
ASCII
pre-shared keys

Q.17 What is the difference between using open authentication and pre-shared keys?
Open authentication requires a password. Pre-shared keys do not require a password.
Open authentication is used with wireless networks. Pre-shared keys are used with wired networks.
Pre-shared keys require an encrypted secret word. Open authentication does not require a secret word.
Pre-shared keys require a MAC address programmed into the access point. Open authentication does not require this programming.

Q.18 What term describes the encoding of wireless data to prevent intercepted data from being read by a hacker?
address filtering
authentication
broadcasting
encryption
passphrase encoding

Q.19 What access-point feature allows a network administrator to define what type of data can enter the wireless network?
encryption
hacking block
traffic filtering
MAC address filtering
authentication

Q.20 What are the two WEP key lengths? (Choose two.)
8 bit
16 bit
32 bit
64 bit
128 bit

Q.21 Complete the following sentence: WEP is used to ______ , and EAP is used to _____ wireless networks.
encrypt; authenticate users on
filter traffic; select the operating frequency for
identify the wireless network; compress data on
create the smallest wireless network; limit the number of users on

Senin, 04 Juni 2012

Tabel Subnet Mask Untuk Kelas A, B, C

Kelas A 11111111.00000000.00000000.00000000           255.0.0.0

Kelas B 11111111.11111111.00000000.00000000           255.255.0.0

Kelas C 11111111.11111111.11111111.00000000           255.255.255.0

Tabel subnetting Kelas A :

CIDR     Subnet Mask            Host                   Network
/8           255.0.0.0                 16777212           1

/9           255.128.0.0             8388606             2

/10         255.192.0.0             4194302             4

/11         255.224.0.0             2097150             8

/12         255.240.0.0             1048574             16

/13         255.248.0.0             524286               32

/14         255.252.0.0             262142               64

/15         255.254.0.0             131070               128


Tabel subneting Kelas B :

CIDR      Subnet                      Host                   Network

/16         255.255.0.0               65534                1

/17         255.255.128.0           32766                2

/18         255.255.192.0           16382                4

/19         255.255.224.0           8190                  8

/20         255.255.240.0           4094                  16

/21         255.255.248.0           2046                  32

/22         255.255.252.0           1022                  64

/23         255.255.254.0           510                    128


Tabel subneting Kelas C :

CIDR      Subnet                       Host                   Network

/24          255.255.255.0           254                    1

/25          255.255.255.128       126                    2

/26          255.255.255.192       62                      4

/27          255.255.255.224       30                      8

/28          255.255.255.240       14                      16

/29          255.255.255.248        6                       32

/30          255.255.255.252        2                       64

/31          255.255.255.254        0                       128