CCNA 7-10

Which range represents all the IP addresses that are affected when network 10.120.160.0 with a wildcard mask of 0.0.7.255 is used in an ACE?

10.120.160.0 to 10.120.167.255

A standard ACL filters network traffic based on the destination MAC address.

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permits or denies traffic through a router based on specific defined criteria.

standard access list An ACL is used to filter traffic attempting to travel through a router.

What are two uses of an access control list? (Choose two.)

ACLs provide a basic level of security for network access. ACLs can control which areas a host can access on a network.

Which scenario would cause an ACL misconfiguration and deny all traffic?

Apply an ACL that has all deny ACE statements. Having all ACEs with deny statements denies all traffic because there is an implicit deny any command at the end of every standard ACL.

Refer to the exhibit. A network administrator wants to create a standard ACL to prevent network 1 traffic from being transmitted to the Research and Development network. On which router interface and in which direction should the standard ACL be applied?

R2 Gi0/0 outbound

Refer to the exhibit. A network administrator is configuring a standard IPv4 ACL. What is the effect after the command no access-list 10 is entered?

Refer to the exhibit. A network administrator is configuring a standard IPv4 ACL. What is the effect after the command no access-list 10 is entered?

Which two commands will configure a standard ACL? (Choose two.)

Router(config)# access-list 90 permit 192.168.10.5 0.0.0.0 Router(config)# access-list 35 permit host 172.31.22.7

Which type of standard ACL is easiest to modify on a production router?

a named ACL that has not been applied yet Two common reasons for having a named ACL are that its function is easier to identify and the ACL is easier to modify.

A network administrator wants to create a standard ACL to prevent network 1 traffic from being transmitted to the Research and Development network. On which router interface and in which direction should the standard ACL be applied?

R2 Gi0/0 outbound Standard ACLs can only specify source addresses, so the standard ACL would contain the network 1 address and appropriate wildcard mask. Also, because standard ACLs can only contain source addresses, the ACL should be placed as close to the destination as possible. The destination is the Research and Development LAN. The R2 Gi0/0 interface is that destination. By tracing the path that the packets will take starting with network 1 and traveling to the Research and Development network, a student can determine that the packets would be coming out of the R2 Gi0/0 interface.

A network administrator is writing a standard ACL that will deny any traffic from the 172.16.0.0/16 network, but permit all other traffic. Which two commands should be used?

Router(config)# access-list 95 deny 172.16.0.0 0.0.255.255 Router(config)# access-list 95 permit any To deny traffic from the 172.16.0.0/16 network, the access-list 95 deny 172.16.0.0 0.0.255.255 command is used. To permit all other traffic, the access-list 95 permit any statement is added.

A network administrator is writing a standard ACL that will deny any traffic from the 172.16.0.0/16 network, but permit all other traffic. Which two commands should be used?

Router(config)# access-list 95 deny 172.16.0.0 0.0.255.255 Router(config)# access-list 95 permit any To deny traffic from the 172.16.0.0/16 network, the access-list 95 deny 172.16.0.0 0.0.255.255 command is used. To permit all other traffic, the access-list 95 permit any statement is added

Which command produced the following output? R1# 10 permit 192.168.1.56 0.0.0.7 20 permit 192.168.1.64 0.0.0.63 (4 match(es)) 30 deny any (8 match(es))

show access-lists The show access-lists command is used to list every access list configured on a router. It also shows how many packets have matched each ACE.

In applying an ACL to a router interface, which traffic is designated as outbound?

traffic that is leaving the router and going toward the destination host

The name of a named standard ACL is case sensitive.

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