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38 Cards in this Set
- Front
- Back
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What type of cable is used to connect two switches together?
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Cross-over cable
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What type of cable is used to connect a PC (or other host) to a switch?
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Straight-through cable
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Range of class A addresses
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1 to 126
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Range of class B addresses
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128 to 191
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Range of class C addresses
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192 to 223
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OSPF multicast IP
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224.0.0.5
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Banner MOTD
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Shown before login prompt
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Banner Login
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Shown before login prompt, but after MOTD
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Banner Exec
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Shown after login prompt.
For info to be kept from unauthorized users. |
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T1 Speed
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1.544 Mbps
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What are the three private subnets?
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10.0.0.0 /8
172.16.0.0 /12 192.168.0.0 /16 |
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ios command to configure ip addresses of name servers
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ip name-server svr1 svr2 ...
global config command |
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How many T1s are in a T3?
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28
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Which ios command will display recently entered commands?
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show history
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¿How to encrypt console and vty passwords?
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From global config mode, type:
service password-encryption |
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What is the range of well-known ports?
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0-1023
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¿What should you do before making changes to an ACL, and why?
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Disable the ACL from its interface using the "no ip access-group" command.
If you don't disable an ACL and you clear its contents and start it from scratch, ios will filter all packets except those permitted by your new commands. |
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¿Where would you want to place a standard ACL, and why?
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Close to the destination.
Standard ACLs filter only on source IPs, so tend to filter more than you may want filtered when placed close to the source. |
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Where would you want to place an extended ACL and why?
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Extended ACLs should be placed as close as possible to the source of the packet, so that the packet will be filtered sooner and take up less network bandwidth.
Also, extended ACLs can filter on more specific criteria than standard ACLs. |
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What happens if an ACL contains no permit statements?
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All traffic is filtered because of the implicit deny statement at the end of the ACL.
The interface is effectively shut down. |
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¿Why would you want to create an ACL in a text editor and not right on the router?
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if you make mistakes while typing, you can fix them in the editor
to Avoid deleting and retyping the entire ACL just to delete a single line in a numbered ACL to be able to add a line to the middle of an existing ACL |
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What are two important differences between names and numbered ACLs?
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Named ACLs are created with a command starting in global config mode, whereas numbered ACLs are started in interface submode.
With named ACLs, the deletion of a line deletes only that line, and not the entire ACL. |
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¿What is the range of numbers for an extended IP access list?
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100-199
or 2000-2699 inclusive. |
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¿What is the range of numbers for a standard IP access list?
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1-99
or 1300-1999 inclusive. |
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¿What does a binary 0 mean in the wildcard mask of an ACL?
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compare the corresponding bit position in the IP address and make sure it is equal to the same bit position in the address from the access-list statement.
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¿What does a binary 1 mean in the wildcard mask of an ACL?
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"don't care bits"- these bit positions are immediately considered to be a match.
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¿What is the bandwidth of a DS0?
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64 Kbps
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¿How many DS0s are in an E1?
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32 DS0s = 32 x 64 Kbps = 2.048 Mbps
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¿How many DS0s are in a DS1 (T1)?
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24 DS0s = 24 x 64 Kbps = 1.544 Mbps
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¿What is an E1?
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Similar to a T1, but used in Europe. It uses a rate of 2.048 Mbps and 32-Kbps channels.
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¿What are the two most popular protocols on Point to Point links?
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HDLC - High-Level Data Link Control
PPP - Point to Point Protocol |
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What command gives detailed CDP info on all neighbors?
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show cdp neighbors detail
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What command gives detailed CDP info on one neighbor?
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show cdp entry [name]
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¿How to configure static host names on a router?
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ip host [name] [address]
global config command |
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¿What's the command to start a named extended ACL?
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ip access-list extended nick
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¿What's the command to start a numbered ACL?
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access-list 101 deny...
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Name 3 items in an entry in any routing table
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subnet number
outgoing interface IP address of the next hop router |
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¿How to configure a default route?
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ip route 0.0.0.0 0.0.0.0 [next hop ip]
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