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Cisco > Security > Adaptive Security Appliances > Models Comparison:

Cisco ASA 5500 Series Model/License	ASA 5505 Base/Security Plus	ASA 5510 Base/Security Plus	ASA 5520	ASA 5540	ASA 5550
Cisco Adaptive Security Appliance Software Version (latest)	7.2.2	7.2.2	7.2.2	7.2.2	7.2.2
Market	Small Business, Branch Office, Enterprise Teleworker	SMB and Small Enterprise	Small Enterprise	Medium Enterprise	Large Enterprise
Performance Summary
Maximum firewall throughput (Mbps)	150	300	450	650	1200
Maximum 3DES/AES VPN throughput (Mbps)	100	170	225	325	425
Maximum site-to-site and remote access VPN user sessions	10/25	250	750	5,000	5,000
Maximum SSL VPN user sessions¹	25	250	750	2,500	5,000
Maximum connections	10,000/25,000	50,000/130,000	280,000	400,000	650,000
Maximum connections/second	3,000	6,000	9,000	20,000	28,000
Packets per second (64 byte)	85,000	190,000	320,000	500,000	600,000
Technical Summary
Memory (MB)	256	256	512	1024	4096
Minimum system flash (MB)	64	64	64	64	64
Integrated ports²	8 port 10/100 switch with 2 Power over Ethernet ports	5-10/100	4-10/100/1000, 1-10/100	4-10/100/1000, 1-10/100	8-10/100/1000, 1-10/100
Maximum virtual interfaces (VLANs)	3 (trunking disabled) / 20 (trunking enabled)	50/100	150	200	250
SSC/SSM expansion slot	Yes (SSC)	Yes (SSM)	Yes (SSM)	Yes (SSM)	No
SSC/SSM Capabilities
SSC/SSMs supported	Future, SSC	CSC-SSM, AIP-SSM, 4GE-SSM	CSC-SSM, AIP-SSM, 4GE-SSM	CSC-SSM, AIP-SSM, 4GE-SSM	No
Intrusion Prevention	Not available	Yes (with AIP-SSM)	Yes (with AIP-SSM)	Yes (with AIP-SSM)	No
Concurrent threat mitigation throughput (Mbps) (firewall + IPS services)	Not available	150 (with AIP-SSM-10) 300 (with AIP-SSM-20)	225 (with AIP-SSM-10) 375 (with AIP-SSM-20)	450 (with AIP-SSM-20)	Not available
Anti-X (anti-virus, anti-spyware, file blocking, anti-spam, anti-phishing, and URL filtering)	Not available	Yes (with CSC-SSM)	Yes (with CSC-SSM)	Yes (with CSC-SSM)	Not available
Maximum number of users for anti-virus, anti-spyware, file blocking (CSC-SSM only)	Not available	500 (CSC-SSM-10) 1000 (CSC-SSM-20)	500 (CSC-SSM-10) 1000 (CSC-SSM-20)	500 (CSC-SSM-10) 1000 (CSC-SSM-20)	Not available
CSC SSM Plus License features	Not available	Anti-spam, anti-phishing, URL filtering	Anti-spam, anti-phishing, URL filtering	Anti-spam, anti-phishing, URL filtering	Not available
Features
Application-layer security	Yes	Yes	Yes	Yes	Yes
Layer 2 transparent firewalling	Yes	Yes	Yes	Yes	Yes
Security contexts (included/maximum)³	0/0	0/0 / 2/5	2/20	2/50	2/50
GTP/GPRS inspection³	Not available	Not available	Yes	Yes	Yes
High availability support⁴	Not supported / Stateless A/S	Not supported / A/A and A/S	A/A and A/S	A/A and A/S	A/A and A/S
IPSec and WebVPN services	Yes	Yes	Yes	Yes	Yes
VPN clustering and load balancing	Not available	Not available	Yes	Yes	Yes
1 Beginning with Cisco ASA Software v7.1, SSL VPN (Web VPN) capability requires a license. Systems include 2 SSL VPN users by default for evaluation and remote management purposes 2 Dedicated out-of-band (OOB) management port (a Cisco ASA 5510 Adaptive Security Appliance with the security+ license or higher model is required to make this interface route traffic) 3 Licensed features 4 A/S = Active/Standby; A/A = Active/Active

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