An administrator attempts to open a web page and sees the following error: 'Error 404: Page not found'. The administrator then uses the ping command and finds that the default gateway cannot be pinged.
At which of the following layers does the problem MOST likely reside?（）
A.Layer 1
B.Layer 4
C.Layer 5
D.Layer 7
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A.Open pairs
B.Attenuation
C.Crosstalk
D.Interference
A. Singlemode fiber
B. Multimode fiber
C. Shielded twisted pair
D. Unshielded twisted pair
A.IGMP
B.SNMP
C.SMTP
D.ICMP
A.Worm
B.Smurf
C.Logic Bomb
D.Man-in-the-middle
A.Star
B.Ring
C.Bus
D.Mesh
A. Router routes traffic between different networks and a switch does not
B. The new switch is faulty and needs to be replaced and configured correctly
C. The firewall needs to be setup to allow traffic to reach the Internet
D. The switch needs to be setup to forward data traffic to the Internet
A.VLAN
B.Peer to Peer
C.VTP
D.VPN
A.DHCP
B.TCP/IP
C.NAT
D.SNMP
A.NAT
B.DNS
C.DHCP
D.PAT
A.Demarc
B.IDF
C.MDF
D.110 block
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