在人寿保险中，下列哪些人对许先生具有可保利益？()

A. Ethernet Private Line

B. Ethernet Wire Service

C. Ethernet Relay Service

D. Ethernet Multipoint Service

E. Ethernet Relay Multipoint Service

A. class of service

B. bandwidth profiles

C. user-network interface

D. Ethernet LAN circuit attributes

E. Ethernet virtual circuit attributes

According to covering scope, which three classes can computer network be divided？ ()

A．PSN, LAN, WAN

B．MAN,LAN,WAN

C．PSN, FAST Ethernet, LAN

D．PSN, FAST Ethernet, MAN

A．1

B．2

C．3

D．4

A．The nearest metro station is only three minutes' walk from the hotel.

B．The nearest metro station is only four minutes' walk from the hotel.

C．The nearest metro station is only five minutes' walk from the hotel.

D．The nearest metro station is only three or four minutes' walk from the hotel.

A．The nearest metro station is only three minutes' walk from the hotel.

B．The nearest metro station is only four minutes' walk from the hotel.

C．The nearest metro station is only five minutes' walk from the hotel.

D．The nearest metro station is only three or four minutes' walk from the hotel.

A. Cisco Remote Management Services

B. Cisco Special Services

C. Cisco Advisory Services

D. Cisco Outsourcing Program

E. Cisco Advanced Services

F. Cisco Technical Support Services

Which of the following services use TCP？ (Choose three)

A. DHCP

B. SMTP

C. SNMP

D. FTP

E. HTTP

F. TFTP

A．Version

B．Type

C．Source Port

D．Flags

E．Data

A. to provide VPN access over L2TP

B. to enable PPP session from the router to the termination device at the headend for metro Ethernet connectivity

C. for DSL connectivity and removing the need for the end - user PC to ru n the PPPoE client software

D. for connecting the router to a cable modem, which bridges the Ethernet frames from the router to the cable modem termination system