After the HMC console completes all FTP operations, the HMC console performs the FTP  operation on the SE’s behalf and returns the results. The IBM Z platform must be managed by  at least one HMC to allow FTP operations to work. Before z14, IBM Z HMC consoles used anonymous cipher suites to set console-to-console  communication. Anonymous cipher suite is a part of SSL/TLS protocol and it can be used to  create internal point-to-point connections. Anonymous cipher suite does not exchange  certificates, which can be the source of a security breach.  Therefore, z14 HMC consoles abandon anonymous cipher suite and implement an industry  standard-based, password-driven cryptography system. The Domain Security Settings are  used to provide authentication and high-quality encryption. Because of these changes, we  now recommend that customers use unique Domain Security settings to provide maximum  security. The new system provides greater security than anonymous cipher suites, even if the  default settings are used.  To allow greater flexibility in password selection, the password limit was increased to 64  characters and special characters are allowed for z14 only installations. If communication with  older systems is needed, the previous password limits must be followed (6 - 8 characters, only  uppercase and number characters allowed). For more information about HMC networks, see the following resources: The following HMC changes are important for z14 ZR1: Secure console-to-console communication 11.3.2 Hardware prerequisite changes RSF is broadband-only GLYPH<SM590000> The HMC and SE (Version 2.14.0) console help system, or IBM Knowledge Center  GLYPH<SM590000> IBM 3907 Installation Manual for Physical Planning,  GC28-6974  GLYPH<SM590000> IBM does not provide Ethernet switches with the system. GLYPH<SM590000> RSF is broadband-only. GLYPH<SM590000> A total of 16 auto-negotiation ports GLYPH<SM590000> 100/1000 Mbps data rate GLYPH<SM590000> Full or half duplex operation GLYPH<SM590000> Auto medium-dependent interface crossover (MDIX) on all ports GLYPH<SM590000> Port status LEDs Ethernet switches Ethernet switches for HMC and SE connectivity are provided by the customer. Existing  supported switches can still be used. Ethernet switches and hubs often include the following characteristics: Note:  The recommendation is to use 1000 Mbps/Full duplex. RSF through a modem is  not  supported on the z14 ZR1 HMC. Broadband is needed for  hardware problem reporting and service. For more information, see 11.4, “Remote Support  Facility” on page 374. Chapter 11. Hardware Management Console and Support Elements  371