Dell PowerConnect 3548 User Manual

26 Introduction
SSH
Secure Shell (SSH) is a protocol that provides a secure, remote connection to a device. SSH version 2 is
currently supported. The SSH server feature enables an SSH client to establish a secure, encrypted
connection with a device. This connection provides functionality that is similar to an inbound telnet
connection. SSH uses RSA and DSA Public Key cryptography for device connections and authentication.
TACACS+
TACACS+ provides centralized security for validation of users accessing the device. TACACS+ provides
a centralized user management system, while still retaining consistency with RADIUS and other
authentication processes.
For more information, see "Defining TACACS+ Settings."
Password Management
Password management provides increased network security and improved password control. Passwords
for SSH, Telnet, HTTP, HTTPS, and SNMP access are assigned security features. For more information
on Password Management, see "Managing Passwords".
Access Control Lists (ACL)
Access Control Lists (ACL) allow network managers to define classification actions and rules for specific
ingress ports. Packets entering an ingress port, with an active ACL, are either admitted or denied entry
and the ingress port is disabled. If they are denied entry, the user can disable the port.
For more information, see "ACL Overview" on page 276.
DHCP Snooping
DHCP Snooping expands network security by providing firewall security between untrusted interfaces
and DHCP servers. By enabling DHCP Snooping network administrators can differentiate between
trusted interfaces connected to end-users or DHCP Servers and untrusted interfaces located beyond the
network firewall.
For more information, see "Configuring DHCP Snooping" on page 288.
Additional CLI Documentation
The CLI Reference Guide, which is available on the Documentation CD, provides information about the
CLI commands used to configure the device. The document provides information about the command
description, syntax, default values, guidelines, and examples.

Dell PowerConnect 3548 Specifications

General

MAC address table	8000 entries
Maximum data transfer rate	0.1 Gbit/s
Supported data transfer rates	10/100 Mbps
10G support	-
Number of VLANs	256
Flow control support	Yes
Networking standards	IEEE 802.1D, IEEE 802.1p, IEEE 802.1Q, IEEE 802.1s, IEEE 802.1w, IEEE 802.3ad
Dimensions (WxDxH)	440 x 257 x 43.2 mm
Networking features	Gigabit Ethernet, Fast Ethernet
Authentication method	RADIUS, TACACS+
Connectivity technology	Wired
Switch type	Managed
Switch layer	L2
Data link protocols	Ethernet
Supported network protocols	HTTP, HTTPS/SSL, SSH
Power connector	DC-in jack
SFP/SFP+ slots quantity	2
Basic switching RJ-45 Ethernet ports quantity	48
Product color	Black
Storage temperature (T-T)	-20 - 70 °C
Operating temperature (T-T)	0 - 45 °C
Storage relative humidity (H-H)	10 - 95 %
Operating relative humidity (H-H)	10 - 90 %

Weight and Dimensions

Weight	8000 g