Which design topology incurs a performance penalty since there are two encryption-decryption cycles between any two remote sites?（）

多项选择题The Schuyler and Livingston Iron Works has been working on getting its network security under control. It has set up VPN with IPSec links to its suppliers. It has installed network vulnerability scanners to proactively identify areas of weakness, and it monitors and responds to security events as they occur. It also employs extensive access control lists, stateful firewall implementations, and dedicated firewall appliances. The company has been growing very fast lately and wants to make sure it is up to date on security measures.Which two areas of security would you advise the company to strengthen? （）

A. intrusion protection
B. identity
C. secure connectivity
D. security management

单项选择题A company is using a multi-site centralized call processing model. Which feature ensures that the remote site IP phones will still have limited functionality given a WAN outage?（）

A.Call Admission Control
B.TAPI
C.MGCP
D.SRST

单项选择题You are the Cisco Network Designer in Cisco.com. Your company is using the G.711 codec with 802.11a access point radios. This can support a maximum of how many phones per access point?（）

A.5
B.10
C.14
D.20

单项选择题Scalability is provided in the server farm module by which of the following design strategies?（）

A. up to 10Gbps of bandwidth at the access level
B. redundant servers at the access level
C. modular block design at the access level
D. high port densities at the access level

多项选择题SCSI interfaces provide for faster data transmission rates (up to 80 megabytes per second) than standard serial and parallel ports. In addition, you can attach many devices to a single SCSI port, so that SCSI is really an I O bus rather than simply an interface Which two statements about SCSI are true?（）

A. The bus is limited to 64 devices.
B. It is a full-duplex serial standard.
C. It is a half-duplex serial standard.
D. It allows up to 320 MB/s of shared channel bandwidth.