If you configure an access-list to block the following networks, what are you trying to protect
against?
Network 127.0.0.0/8, Network 0.0.0.0, Network 10.0.0.0\8, Network 172.16.0.0\16, and Network
168.0.0\16.

You are a host in a network segment that has IP addresses in the range of
168.16.1~192.168.31.254. You need to create an access control list that will filter your segment of
addresses. Which of the following is the wildcard mask that will be used to filter your network
segment?

The exhibit represents a simple routed network. Node 7 is a Windows NT 4.0 Workstation that
establishes a TCP communication with Node 10, a Windows 2000 Professional host. The routers
are Cisco 2500 series running IOS 11.2.
While working at Node 10, you run a packet capture. When Node 10 receives a packet sent by
Node 7, what will the capture reveal is the source MAC address?

During a network capture, using Wireshark, you capture some ICMP traffic for analysis. In an
ICMP
Message, what is the function of the first eight bits?

A router has two active Ethernet interfaces. Interface E0 is connected to network 10.10.0.0/16
while
Interface E1 is connected to network 10.11.0.0/16. You are configuring access control lists to
manage specific access, which is disallowed on these segments. The configuration of the lists are
as follows:
router(config)#access-list 123 deny tcp 10.11.0.0 0.0.255.255 10.10.0.0 0.0.255.255 eq 20
router(config)#access-list 123 deny tcp 10.11.0.0 0.0.255.255 10.10.0.0 0.0.255.255 eq 21
router(config)#access-list 123 deny tcp 10.10.0.0 0.0.255.255 10.11.0.0 0.0.255.255 eq 20
router(config)#access-list 123 deny tcp 10.10.0.0 0.0.255.255 10.11.0.0 0.0.255.255 eq 21
router(config)#access-list 123 permit tcp 0.0.0.0 255.255.255.255 0.0.0.0 255.255.255.255
router(config)#Interface Ethernet 0
router(config-if)#ip access-group 123 in
router(config-if)#Interface Ethernet 1
router(config-if)#ip access-group 123 in
Based on the above list configuration, which of the following statements is true on the router?