更多"Which of the following are data lay"的相关试题:
[单项选择]Which layer 2 protocol encapsulation type supports synchronous and asynchronous circuis and has built-in security mechanisms?（）
A. Frame Relay
B. HDLC
C. x.25
D. PPP
[单项选择]Which layer in the OSI reference model is responsible for determining the availability of the receiving program and checking to see if enough resources exist for that communication?（）
A. transport
B. network
C. presentation
D. session
E. application
[单项选择]Which layer of the OSI reference model uses flow control, sequencing, and acknowledgements to ensure that reliable networking occurs?（）
A. data link
B. network
C. transport
D. presentation
E. physical
[单项选择]Which layer of the OSI reference model uses the hardware address of a device to ensure message delivery to the proper host on a LAN?（）
A. physical
B. datalink
C. network
D. transport
[多项选择]Which Layer 1 devices can be used to enlarge the area covered by a single LAN segment?（）
A. Switch
B. Router
C. NIC
D. hub
E. Repeater
F. RJ-45 transceiver
[单项选择]At which layer of the OSI model is RSTP used to prevent loops?（）
A. data link
B. network
C. physical
D. transport
[单项选择]At which layer of the OSI model dose PPP perform?（）
A. Layer 3
B. Layer 4
C. Layer 2
D. Layer 5
[多项选择]Which two data intergrity algorithms are commonly used in VPN solutions?（）
A. HMAC-MD5
B. RSA
C. HMAC-SHA-1
D. DH1
E. DH2
[单项选择]Which ARPA data should you use in order to determine if a close quarters situation will develop with a target vessel? （）
A. Set and drift of the current
B. Relative track information
C. Predicted time of CPA
D. Initial range of acquisition
[多项选择]Which three Layer 2 encapsulation types would be used on a WAN rather than a LAN? （）
A. HDLC
B. Ethernet
C. Token Ring
D. PPP
E. FDDI
F. Frame Relay
[多项选择]Which three statements accurately describe layer 2 Ethernet switches?（）
A. Microsegmentation decreases the number of collisions on the network.
B. if a switch receives a frame for an unkown destination,it uses ARP to resolve the address.
C. Spanning Tree Protocol allows switches to automatically share vlan information.
D. In a properly functioning network with redundant switched paths,each switched aegment will contain one root bridge with all its ports in the forwarding state.All other switches in that broadcast domain will have only one root port.
E. Establishing vlans increases the number of broadcast domains.
F. Switches that are configured with vlans make forwarding decisions based on both layer 2 and layer 3 address information.
