单项选择题
Which one of the following protocols uses both UDP and TCP ports for the transport layer operation?（）
A.FTP
B.TFTP
C.SMTP
D.Telnet
E.DNS
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相关考题
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多项选择题
Which of the following protocols utilize UDP as the layer 4 transport mechanism?（）
A.TACACS
B.Telnet
C.SMTP
D.SNMP
E.HTTP
F.TFTP -
多项选择题
Which of the protocols below use TCP at the transport layer?（）
A.TFTP
B.SMTP
C.SNMP
D.FTP
E.HTTP
F.HTTPS -
单项选择题
You have just configured a static default route on router TK1. What is the purpose of a default route?（）
A. It is a route to be used when the routing protocol fails.
B. It is a route configured by an ISP that sends traffic into a corporate network.
C. It is a route used when a packet is destined for a remote network that is not listed in the routing table.
D. It is a route manually configured for a specific remote network for which a routing protocol is not configured.
E. It is used to send traffic to a stub network.
