Upload
ghulam-faqih-hasibuan
View
224
Download
0
Embed Size (px)
Citation preview
8/6/2019 (01) Laporan Dedicated Router
1/25
8/6/2019 (01) Laporan Dedicated Router
2/25
Hierarki Picture
1. Core Layer
Menurut sumber yang telah saya baca dan terjemahkan jadi lapisan ini dianggap sebagai
tulang punggung jaringan dan termasuk high-end switch dan kabel berkecepatan tinggi sepertifiber optic dan lapisan inti bertanggung jawab untuk cepat dan transportasi data dapat diandalkan
di seluruh jaringan. Pada core layer keefektivitasan adalah kuncinya. Sistem yang lebih sedikit
dan lebih cepat menciptakan backbone yang lebih efisien. Ada beberapa peralatan yang tersediandalam layer ini. Contoh peralatan core layer Cisco meliputi:
Cisco switches seperti 7000, 7200, 7500, and 12000 (dipakai dalam WAN)
Catalyst switches seperti 6000, 5000, dan 4000 (dipakain dalam LAN)
T-1 and E-1 lines, Frame relay connections, jaringan ATM, Switched Multimegabit DataService (SMDS)
Provides up to twice the performance compared to the Cisco 7301up to two million
packets per second (mpps) in Cisco Express Forwarding (CEF)
Offers four built-in Gigabit Ethernet (GE) ports
Provides one dedicated 10/100-Mbps copper Ethernet port for management
Provides one USB port for general storage and security token storage
Provides a single Cisco 7000 Series port adapter slot
Offers front-to-back airflow and single-sided management
http://1.bp.blogspot.com/_MHtLiBfiGLQ/TTRUxZRWa2I/AAAAAAAAAAM/-gWgTPHR5tM/s1600/hierarki.png8/6/2019 (01) Laporan Dedicated Router
3/25
2. Distribution Layer
Lapisan ini mencakup LAN berbasis router dan layer 3 switch. Lapisan ini memastikan
bahwa paket yang benar diarahkan antara subnet dan VLAN di perusahaan anda. Lapisan inijuga disebut lapisan Workgroup .Lapisan ini bertanggung jawab atas routing. Juga menyediakan
konektivitas jaringan berbasis pada kebijakan, termasuk:
Packet filtering (firewalling)
QoS
Access Layer Aggregation Point
Control Broadcast and Multicast
Application Gateways
Lapisan ini juga melakukan antrian dan menyediakan manipulasi paket data dari lalu lintasjaringan.
Hal ini di lapisan di mana kita mulai melakukan kontrol atas transmisi jaringan, termasuk apayang masuk dan apa yang keluar dari jaringan. Kita juga akan membatasi dan menciptakan
broadcast domain, menciptakan virtual LAN, jika perlu, dan melakukan berbagai tugaspengelolaan, termasuk mendapatkan ringkasan rute. Dalam ringkasan rute, kita menggabungkan
lalu lintas dari subnet banyak ke dalam koneksi jaringan inti. Dalam router Cisco, perintah untuk
mendapatkan ringkasan routing adalah:
show ip route summary (menunjukkan ringkasan ip route)
Contoh peralatan pada layer ini Cisco-spesifik lapisan termasuk 2600,4000, 4500 router series,
Cisco Catalyst 6500 Series Switches
Supports all Cisco Catalyst 6500 Series modules, including:Supervisor enginesFast Ethernet
modules (with IEEE 802.3af Power over Ethernet [PoE])Gigabit Ethernet modules (with IEEE
802.3af PoE)10 Gigabit Ethernet modulesFlex WAN modulesShared Port Adaptors/SPAInterface ProcessorsMulti-Gigabit services modules (content services ,firewall, intrusion
detection, IP Security [IPSec], VPN, network analysis, and Secure Sockets Layer [SSL]
acceleration).
8/6/2019 (01) Laporan Dedicated Router
4/25
3. Access Layer
Lapisan ini meliputi hub dan switch. Lapisan ini juga disebut lapisan desktop karena
berfokus pada node klien yang terhubung, seperti workstation ke jaringan. Lapisan inimemastikan bahwa paket yang dikirim ke komputer pengguna akhir.
Access layer berisi perangkat yang memungkinkan kelompok kerja dan pengguna untuk
menggunakan layanan yang diberikan oleh distribution layer dan core latyer. Pada access layer,
kita memiliki kemampuan untuk memperluas atau collision domain kontrak menggunakanrepeater, hub, atau switch standar. Berkenaan dengan lapisan ini, switch bukan sebuah perangkat
bertenaga tinggi, seperti yang ditemukan di core layer.
Beberapa perangkat yang termasuk Access Layer :
Cisco 3900 Series Integrated Services Routers
Cisco 2900 Series Integrated Services Routers
Cisco 1900 Series Integrated Services Routers
Cisco 800 Series Routers
Linksys by Cisco WRT54GL SoHo Router
3. Alat dan Bahan
Seperangkat PC (OS Windows XP/7)
Software Simulator Packet Tracer
Microsoft Office Visio
Modul tentang Dedicated Router
4. Soal Pembelajaran
a) Identifikasi Dedicated Router.
b) Kelompokan Dedicated Router tersebut apakah digunakan untuk Core Layer, Distributte
Layer, atau Access Layer.
c) Tentukan penempatan perangkat sesuai spesifikasi dan seri.d) Buat topologi yang terdapat router tersebut.
e) Lakukan konfigurasi pada router tersebut.
8/6/2019 (01) Laporan Dedicated Router
5/25
8/6/2019 (01) Laporan Dedicated Router
6/25
Integrated secure 802.11a/g/n access
point (optional) based on the draft
802.11n standard; dual-band radios for
mobility and support for autonomous
or Cisco Unified WLAN architectures
Enhanced security including:
- Firewall with advance application
and control for email, instant
messaging (IM), and HTTP traffic
- Site-to-site remote-access
and dynamic VPN services: IP
Security (IPsec) VPNs (Triple Data
Encryption Standard [3DES] or
Advanced Encryption Standard
[AES]), Dynamic Multipoint VPN
[DMVPN], Group Encrypted
Transport VPN [GET VPN] with
onboard acceleration, and Secure
Sockets Layer [SSL] VPN
- Intrusion prevention system (IPS):
An inline, deep-packet-inspection
feature that mitigates a wide range
8/6/2019 (01) Laporan Dedicated Router
7/25
of network attacks
- Content filtering: A subscriptionbased
integrated security
solution that offers categorybased
reputation rating, keyword
blocking, and protection against
adware, malware, spyware, and
URL blocking
An 8-port 10/100 Fast Ethernet
managed switch with VLAN support
and 4-port support for Power over
Ethernet (PoE) (optional) to power IP
phones or external access points
Metro Ethernet features include:
- One 1000 BASE-T Gigabit
Ethernet WAN port
- One 10/100 BASE-T Fast
Ethernet WAN port
- Intelligent hierarchical quality
of service (HQoS): Supports
hierarchical queuing and
shaping
8/6/2019 (01) Laporan Dedicated Router
8/25
- Connectivity Fault Management
(CFM), based on 802.1ag
- 802.3ah standard based Link
operational administration and
maintenance (OAM)
- Ethernet Local Management
Interface (E-LMI) for the
Customer Edge
Two USB 2.0 ports for security
eToken credentials, booting, and
loading configuration from USB
Cisco 1900 Series
Integrated Services
Routers
Embedded hardware-accelerated
VPN encryption
Secure collaborative communications
with Group Encrypted Transport VPN,
Dynamic Multipoint VPN, or Enhanced
Easy VPN
Integrated threat control using Cisco
IOS Firewall, Cisco IOS Zone-Based
Firewall, Cisco IOS IPS, and Cisco IOS
Content Filtering
Identity management that uses
8/6/2019 (01) Laporan Dedicated Router
9/25
authentication, authorization, and
accounting (AAA), and public key
infrastructure
2 Integrated 10/100/1000 Ethernet
ports
2 enhanced High-Speed WAN
Interface Card slots that can host
2 single wide or 1 double wide and
1 single wide (e)HWIC
Fully integrated power distribution
to modules supporting 802.3af
Power over Ethernet (PoE) and Cisco
Enhanced PoE
Cisco 1800 Series
(Fixed-configuration)
Secure, concurrent services for
broadband access with WAN high
availability
Manageability and reliability of
Cisco IOS Software Business-class
Security
Stateful firewall with URL filtering
VPN 3DES encryption and Advanced
Encryption Standard (AES)
encryption
8/6/2019 (01) Laporan Dedicated Router
10/25
Dynamic Multipoint VPN (DMVPN)
Intrusion Prevention System (IPS)
Fixed Configuration
Secure broadband access at
broadband performance
Integrated ISDN Basic Rate S/T
Interface (BRI), analog modem, or
Ethernet backup port for redundant
WAN links and load balancing
Secure wireless LAN option for
simultaneous 802.11a and 802.11b/g
with use of multiple antennas
8-port 10/100 managed switch with
802.1q VLAN support and optional
Power over Ethernet (PoE)
Cisco 7304 Series High-performance connectivity up to
OC-48 speeds
Built-in GbE for high-performance
LAN connectivity
Hardware-accelerated services with
Parallel Express Forwarding
Optional redundant processor and
power supplies for high availability in
8/6/2019 (01) Laporan Dedicated Router
11/25
a single box solution
Multiprotocol support
Business-class Security VPN
Hardware-accelerated Access
Control Lists
Stateful inspection firewall
Modularity
More than 20 network line cards
Chassis supports up to 4 line cards
or port adapters
Built in GbE ports on processor
Support for Cisco port adapters
Manageability and reliability of
Cisco IOS Software2 Distributed
Layer
Cisco 860 Series Concurrent broadband services for
small offices, and remote sites
Secure connectivity with Stateful
Inspection Firewall and IP Security
(IPsec) VPN support for small offices
Security features including:
- Stateful Inspection Firewall
- IP Security (IPsec) VPNs (Triple
Data Encryption Standard [3DES]
8/6/2019 (01) Laporan Dedicated Router
12/25
or Advanced Encryption Standard
[AES])
4-port 10/100 Fast Ethernet managed
switch with VLAN support
CON/AUX Port for console or external
modem
Secure 802.11g/n access point
option based on IEEE802.11n draft 2.0
standard
Easy setup, deployment, and remote
management capabilities through
Web-based tools and Cisco IOS
Software
Cisco 2800 Series 2 integrated 10/100/1000 Ethernet
ports
2 enhanced High-Speed WAN
Interface Card slots that can host 2
single wide or 1 double wide and 1
single wide (e)HWIC
1 Internal Services Module slot
Fully integrated power distribution
to modules supporting 802.3af
Power over Ethernet (PoE) and Cisco
8/6/2019 (01) Laporan Dedicated Router
13/25
Enhanced PoE
Secure Networking
Hardware-based VPN acceleration
on motherboard
Antivirus Defense
Intrusion Prevention System (IPS)
IP Communications and IP
Telephony Support
IP Communications Express
(CCME/SRST/CUE)
Enhanced Modularity (EVM and
PVDM2 support) Integrated
Switching
Up to 64 powered 10/100 switch
ports
802.3af Power over Ethernet
compliance
Cisco Catalyst 6500Series Switches
Supports all Cisco Catalyst 6500 Series moduleincluding:Supervisor enginesFast Ethernet modules (with IEE
802.3af Power over Ethernet [PoE])Gigabit Ethernet modul
(with IEEE 802.3af PoE)10 Gigabit Ethernet modulesFlex WA
modulesShared Port Adaptors/SPA Interface ProcessorsMulGigabit services modules (content services ,firewall, intrusio
detection, IP Security [IPSec], VPN, network analysis, an
Secure Sockets Layer [SSL] acceleration).
ASR 1000 SeriesAggregation Services
Routers
Industry-leading performance, service capabilities, reliability, anefficiencies in a compact form factor
Ideal for enterprises for private WAN, Internet edge, WAN
http://www.cisco.com/en/US/products/ps9343/index.htmlhttp://www.cisco.com/en/US/products/ps9343/index.htmlhttp://www.cisco.com/en/US/products/ps9343/index.htmlhttp://www.cisco.com/en/US/products/ps9343/index.htmlhttp://www.cisco.com/en/US/products/ps9343/index.htmlhttp://www.cisco.com/en/US/products/ps9343/index.html8/6/2019 (01) Laporan Dedicated Router
14/25
aggregation deployments, and also as a high-end managedcustomer premises equipment (CPE)
Highly secure, high-performance "instant-on" services including
multi-gigabit VPN, encryption, firewall, application intelligenceand broadband services
Extends network as a platform for cloud computing to helpconserve resources and optimize performance
Enhances operating efficiencies by using its compact form facto
to reduce power consumption, space, and sparing requirements
Offers software redundancy on non-redundant hardware withASR 1002 and ASR 1004 routers
Offers highly scalable, hardware redundancy and 40 Gbps
services and interface processors in the ASR 1006 and ASR 101
routers
Catalyst 6500 SeriesSwitches
Cisco's flagship switching solution offering industry-leadingservices and performance along with comprehensive feature sets
for core, distribution, wiring closet, data center, enterprise WAN
routing, and Metro Ethernet deployments
Delivers maximum network uptime and provides comprehensiveintegrated network security
Provides up to 400-mpps performance with distributed
forwarding architecture
3 Access Layer Cisco 800 SeriesIntegrated Services
Router
Provides secure WAN connectivity with desktop form factor
Ideal for telecommuters and small offices
Wire-speed performance with secure data services for xDSL,cable, and Ethernet WAN environments
Factory-selectable 802.11n access point, 3G WAN, and
Survivable Remote Site Telephony (SRST) options
Cisco ME 3600XSeries
Facilitates access deployments that require the flexibility of a"pay-as-you-grow" service model
http://www.cisco.com/en/US/products/ps10956/index.htmlhttp://www.cisco.com/en/US/products/ps10956/index.htmlhttp://www.cisco.com/en/US/products/ps10956/index.htmlhttp://www.cisco.com/en/US/products/ps10956/index.html8/6/2019 (01) Laporan Dedicated Router
15/25
Simplifies field upgrades from 1 Gigabit Ethernet to 10 GigabitEthernet
Efficiently extends MPLS to the access layer
Delivers premium services with hierarchical quality of service,
large buffers, and a large number of queues
Cisco 3900 Series
Integrated ServicesRouter
Delivers scalable rich-media services including TelePresence,
highest density of service virtualization, and lowest TCO withenergy efficiency
Ideal for high-end deployments requiring business continuity,
WAN flexibility, superior collaboration capabilities, and
investment protection
Field-upgradeable motherboard, circuit-speed WAN performancup to 350 Mbps with services such as security, mobility, WAN
optimization, unified communications, video, and customized
applications
Cisco 1900 Series
Integrated Services
Router
Entry-level secure WAN deployments, offers service
virtualization, and low TCO
Ideal for small offices requiring modular flexibility for highlysecure mobility and customizable applications
Circuit-speed performance up to 25 Mbps with concurrent
services
Factory-selectable 802.11n access point and double-wide HWIC
support; desktop form factor
Cisco 1800 Series
(Modular)
Wire-speed performance with
secure data services enabled at up
to T1/E1/xDSL rates
Increased services density for
secure data services
8/6/2019 (01) Laporan Dedicated Router
16/25
Support for next-generation
High-speed WAN Interface Cards
Increased flexibility through
support of internal AIM slot for
high-speed VPN and future
applications
Built-in dual Fast Ethernet ports
Support for over 30 existing and
new modules Secure Networking
Hardware-based VPN acceleration
on motherboard
d) Buat topologi seperti gambar di bawah ini.
http://1.bp.blogspot.com/_MHtLiBfiGLQ/TTRWWaGqb8I/AAAAAAAAAAQ/KvvpT1Mc-HQ/s1600/New+Picture+%25284%2529.bmp8/6/2019 (01) Laporan Dedicated Router
17/25
Konfigurasi IP
PC0
IP Address : 1.1.1.2/24
Gateway : 1.1.1.1
PC5
IP Address : 7.7.7.2/24
Gateway : 7.7.7.1
Konfigurasi Access Router 1
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#interface FastEthernet0/1
Router(config-if)#ip address 1.1.1.1 255.0.0.0
Router(config-if)#ip address 1.1.1.1 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#
Router(config-if)#exit
Router(config)#interface FastEthernet0/0
Router(config-if)#ip address 2.2.2.1 255.0.0.0
Router(config-if)#ip address 2.2.2.1 255.255.255.0
Router(config-if)#no shutdown
8/6/2019 (01) Laporan Dedicated Router
18/25
Router(config-if)#
Router(config-if)#exit
Router(config)#interface FastEthernet0/0
Router(config-if)#
Router(config-if)#exit
Router(config)#interface FastEthernet0/1
Router(config-if)#exit
Router(config)#ip route 3.3.3.0 255.255.255.0 2.2.2.2
Router(config)#ip route 4.4.4.0 255.255.255.0 2.2.2.2
Router(config)#ip route 5.5.5.0 255.255.255.0 2.2.2.2
Router(config)#ip route 6.6.6.0 255.255.255.0 2.2.2.2
Router(config)#ip route 7.7.7.0 255.255.255.0 2.2.2.2
Konfigurasi Distributed Router 1
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#interface FastEthernet0/1
Router(config-if)#ip address 2.2.2.2 255.0.0.0
Router(config-if)#ip address 2.2.2.2 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#
Router(config-if)#exit
Router(config)#interface FastEthernet0/0
Router(config-if)#ip address 3.3.3.1 255.0.0.0
Router(config-if)#ip address 3.3.3.1 255.255.255.0
8/6/2019 (01) Laporan Dedicated Router
19/25
Router(config-if)#no shutdown
Router(config-if)#
Router(config-if)#exit
Router(config)#ip route 1.1.1.0 255.255.255.0 2.2.2.1
Router(config)#ip route 4.4.4.0 255.255.255.0 3.3.3.2
Router(config)#ip route 5.5.5.0 255.255.255.0 3.3.3.2
Router(config)#ip route 6.6.6.0 255.255.255.0 3.3.3.2
Router(config)#ip route 7.7.7.0 255.255.255.0 3.3.3.2
Konfigurasi Core Router 1
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#interface FastEthernet0/0
Router(config-if)#ip address 3.3.3.2 255.0.0.0
Router(config-if)#ip address 3.3.3.2 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#
Router(config-if)#exit
Router(config)#interface FastEthernet0/1
Router(config-if)#ip address 4.4.4.1 255.0.0.0
Router(config-if)#ip address 4.4.4.1 255.255.255.0
Router(config-if)#no shutdown
8/6/2019 (01) Laporan Dedicated Router
20/25
Router(config-if)#
Router(config-if)#exit
Router(config)#ip route 1.1.1.0 255.255.255.0 3.3.3.1
Router(config)#ip route 2.2.2.0 255.255.255.0 3.3.3.1
Router(config)#ip route 5.5.5.0 255.255.255.0 4.4.4.2
Router(config)#ip route 6.6.6.0 255.255.255.0 4.4.4.2
Router(config)#ip route 7.7.7.0 255.255.255.0 4.4.4.2
Konfigurasi Core Router 2
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#interface FastEthernet0/1
Router(config-if)#ip address 4.4.4.2 255.0.0.0
Router(config-if)#ip address 4.4.4.2 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#
Router(config-if)#exit
Router(config)#interface FastEthernet0/0
Router(config-if)#ip address 5.5.5.1 255.0.0.0
Router(config-if)#ip address 5.5.5.1 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#
Router(config-if)#exit
Router(config)#ip route 1.1.1.0 255.255.255.0 4.4.4.1
Router(config)#ip route 2.2.2.0 255.255.255.0 4.4.4.1
8/6/2019 (01) Laporan Dedicated Router
21/25
Router(config)#ip route 3.3.3.0 255.255.255.0 4.4.4.1
Router(config)#ip route 6.6.6.0 255.255.255.0 5.5.5.2
Router(config)#ip route 7.7.7.0 255.255.255.0 5.5.5.2
Konfigurasi Distributed Router 4
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#interface FastEthernet0/0
Router(config-if)#ip address 5.5.5.2 255.0.0.0
Router(config-if)#ip address 5.5.5.2 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#
Router(config-if)#exit
Router(config)#interface FastEthernet0/1
Router(config-if)#
Router(config-if)#exit
Router(config)#interface FastEthernet0/0
8/6/2019 (01) Laporan Dedicated Router
22/25
Router(config-if)#
Router(config-if)#exit
Router(config)#interface FastEthernet0/1
Router(config-if)#ip address 6.6.6.1 255.0.0.0
Router(config-if)#ip address 6.6.6.1 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#exit
Router(config)#ip route 1.1.1.0 255.255.255.0 5.5.5.1
Router(config)#ip route 2.2.2.0 255.255.255.0 5.5.5.1
Router(config)#ip route 3.3.3.0 255.255.255.0 5.5.5.1
Router(config)#ip route 4.4.4.0 255.255.255.0 5.5.5.1
Router(config)#ip route 7.7.7.0 255.255.255.0 6.6.6.2
Konfigurasi Access Router 6
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#interface FastEthernet0/0
Router(config-if)#ip address 6.6.6.2 255.0.0.0
Router(config-if)#ip address 6.6.6.2 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#
Router(config-if)#exit
Router(config)#interface FastEthernet0/1
Router(config-if)#
Router(config-if)#exit
8/6/2019 (01) Laporan Dedicated Router
23/25
Router(config)#interface FastEthernet0/0
Router(config-if)#
Router(config-if)#exit
Router(config)#interface FastEthernet0/1
Router(config-if)#ip address 7.7.7.1 255.0.0.0
Router(config-if)#ip address 7.7.7.1 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#exit
Router(config)#ip route 1.1.1.0 255.255.255.0 6.6.6.1
Router(config)#ip route 2.2.2.0 255.255.255.0 6.6.6.1
Router(config)#ip route 3.3.3.0 255.255.255.0 6.6.6.1
Router(config)#ip route 4.4.4.0 255.255.255.0 6.6.6.1
Router(config)#ip route 5.5.5.0 255.255.255.0 6.6.6.1
6. Hasil Percobaan
Uji Koneksi ke Gateway PC
Uji Koneksi ke Gateway Pusat 1
http://3.bp.blogspot.com/_MHtLiBfiGLQ/TTRXDtyb2yI/AAAAAAAAAAY/RYt5oFEDMU8/s1600/uji+ke+gateway+pusat+1.bmphttp://2.bp.blogspot.com/_MHtLiBfiGLQ/TTRWyACmTgI/AAAAAAAAAAU/3zhKSU7n4k4/s1600/uji+ke+gateway+pc.bmp8/6/2019 (01) Laporan Dedicated Router
24/25
Uji Koneksi ke Gateway Pusat 2
Uji Koneksi ke PC 5
Trace Route Ke Gateway Pusat
Trace Route Ke PC 5
http://3.bp.blogspot.com/_MHtLiBfiGLQ/TTRYgEH49cI/AAAAAAAAAAg/gJXN9lAqvXc/s1600/New+Picture+%25282%2529.bmphttp://3.bp.blogspot.com/_MHtLiBfiGLQ/TTRZ9SBBnSI/AAAAAAAAAAk/yaP_dIcIPq8/s1600/uji+ke+pc.bmphttp://2.bp.blogspot.com/_MHtLiBfiGLQ/TTRX4vqHK6I/AAAAAAAAAAc/hR_B0RlygRA/s1600/uji+ke+gateway+pusat+2.bmp8/6/2019 (01) Laporan Dedicated Router
25/25
7. Kesimpulan
Dedicated Router merupakan Router yang dirancang oleh vendor masing masing dan
memiliki fungsi pula yang telah ditentukan oleh vendor. Dengan dedicated ini juga kita dapatmenghubungkan beberapa network.
http://3.bp.blogspot.com/_MHtLiBfiGLQ/TTRarou84vI/AAAAAAAAAAo/0qcA-tvOq7s/s1600/New+Picture+%25283%2529.bmp