TCP/IPNetwork Administration-Solaris™ Operating Environment

bnso

1.        What does the arp protocol do?

A.        Translate the 48 bit ethernet address to the 32 bit IP address
B.        Translate the 32 bit IP address to the hostname
C.        Translate the 32 bit IP address to the 48 bit ethernet address
D.        Translate the 48 bit ethernet address to the hostname

C (ARP stands for address resolution protocol, it is used when a machine knows the IP address, but needs to find the ethernet address for the packet).

2.        What is the /etc/inet/networks file used for?

A.        Name networks for the netstat command
B.        Configure route tables for the in.routed daemon
C.        Configure netmasks for VLSM networks
D.        Configure network devices for the system

A (The /etc/inet/networks file is in my way of thinking, completely useless.  All it really does is give names to networks for when you type the netstat –r command)

3.        Given the following, what is the network number?
IP Address:  10.1.3.2
Netmask: 255.255.255.224

A.        10.1.3.2
B.        10.1.3.0
C.        10.1.3.31
D.        10.1.3.255

B (The network number is found by doing a logical or on the octet of the IP address and the netmask)

4.        Given the following, what is the host number?
IP Address:  10.1.3.48
Netmask: 255.255.255.224

A.        48
B.        16
C.        63
D.        32

B (The host number is derived from the part of the subnet mask that has the 0 bit set.  ie. 255.255.255.224 translates in binary to:
11111111 11111111 11111111 11100000
Everything with a one in it translates to the network number, while everything with a 0 in translates to the host number.  Running an or function on the host number part and having 10.1.3.48 translate to:
00001010 00000001 00000011 00110000
you get:
10000 – thus making the network number 16 when translated into decimal notation)

5.        Given the following, what is the broadcast address?
IP Address 192.168.40.35
Netmask: 255.255.255.240

A.        192.168.40.255
B.        192.168.40.0
C.        192.168.40.32
D.        192.168.40.47

D (To get the broadcast address, you must do an and function on the binary format of the IP address and the netmask.  Doing this you end up with 192.168.40.47)

bnso

1.        What class would the IP address 138.24.30.21 fall into?

A.        A
B.        B
C.        C
D.        D

B (The class of IP addresses can be determined as follows:
A: 0 in the first bit of the first octet
B: 10 in the first two bits of the first octet
C: 110 in the first three bits of the first octet
D: 1110 in the first four bits of the first octet)

2.        What file would be created in the /etc directory to add a router to the default network?
_______________________________

defaultrouter (the /etc/defaultrouter file contains the ip address for the default router for the subnet the host is on)

3.        Which of the following are Interior Gateway Protocols?

A.        BGP
B.        IS-IS
C.        OSPF
D.        RIP

B, C, D (All three of these are interior gateway protocols.  BGP is an exterior gateway protocol)

4.        To make a multi-homed system advertise routes, what command should you use?

A.        /usr/sbin/in.routed –q
B.        /usr/sbin/in.routed –s
C.        /usr/sbin/in.routed –v
D.        /usr/sbin/in.routed –g –t

B (/usr/sbin/in.routed –s will make routed advertise it’s routes.)

5.        What file would you create to initialize a second network card (hme1) upon bootup?

A.        /etc/hosts
B.        /etc/inet/networks
C.        /etc/hostname.hme1
D.        /etc/init.d/inetinit

C (/etc/hostname.hme1 should have a hostname in it that can be resolved to IP address through the /etc/inet/hosts file)

bnso

1.        What switch for the route command would be used to clean out the route table?

_________________________________

–f (this will flush the route table)

2.        What file can you edit to add a permanent route upon bootup?

_________________________________

/etc/gateways

3.        udp would be described as what type of protocol?

A.        connection-oriented
B.        connectionless
C.        stateful
D.        stateless

B

4.        To access an rpc service, the inetd daemon looks at what files?

A.        /etc/inetd.conf
B.        /etc/shells
C.        /etc/rpc
D.        /etc/servuces

A, C (rpc information when named in inetd.conf looks at /etc/rpc for the numeric translation of the name)

5.        To add a service to the inetd daemon, you must modify what file(s)?

A.        /etc/inet.conf
B.        /etc/rpc
C.        /etc/shells
D.        /etc/services
A, D

bnso

1.        Given the following in the /etc/inetd.conf file, what is configured?
ftp                stream        tcp        nowait                root        /usr/sbin/in.ftpd        in.ftpd

A.        The service in.ftpd runs the daemon ftp as a tcp stream
B.        The ftp service runs the command /usr/sbin/in.ftpd as root
C.        The in.ftpd service runs the command /usr/sbin/in.ftpd as root over tcp protocol
D.        The ftp service runs as a tcp protocol as root running /usr/sbin/in.ftpd

D (I know the question is lame, but many of the Sun ones are as well)

2.        What file would you create to setup a dhcp client on Solairs?

A.        /etc/dhcp
B.        /etc/hostname.dhcp2
C.        /etc/dhcp.hme1
D.        /var/dhcp

C (This command will automatically set the Solaris system to look for a dhcp server upon boot)

3.        Given the following in the dhcp_network table, what is the lease time for the ip address?
00                03        123.32.43.23        123.32.43.89        -1        mc12

A.        The lease time is set for 3 hours
B.        The lease time is set indefinitely
C.        The lease time is set to expire as soon as the IP address is available
D.        The lease time is not set at all
B (The –1 means that the lease time is set as a permanent IP address assignment)

4.        What command would you use to configure the dhcp_network file?

_______________________________

pntadm (I am not going to delve into this topic, but I would recommend you know about the switches associated with this command)

5.        What command would you use to configure the dhcptab file?

________________________________

dthadm(I am not going to delve into this topic, but I would recommend you know about the switches associated with this command)

bnso

1.        What command would set the DHCP agent to log details of the packets exchanged with the server?

A.        /sbin/dhcpagent –f –l 0
B.        /sbin/dhcpagent –f –s
C.        /sbin/dhcpagent –d3
D.        /sbin/dhcpagent –l2

        C (-d3 turns debugging on to level 3)

2.        Which of the following are SNMP functions?

A.        get
B.        put
C.        set
D.        trap

A, B, D (get, set, and trap are the three main SNMP functions.  With these you can set up remote administration and monitoring)

3.        Given the following in DNS, what is happening?
zyx                IN CNAME        out.abc.corp

A.        zyx is a name server that gets its information from out.abc.corp
B.        zyx is an alias to out.abc.corp
C.        out.abc.corp is an alias to zyx
D.        out.abc.corp is the main server for the subdomain of zyx

B (CNAME (Canonical Name) is basically an alias in DNS)

4.        Given the following, where will any DNS error messages go?
@        IN SOA abc.def.com.                me.def.com. (
                1
                43200
                3600
                604800
                86400
                )

A.        root@def.com
B.        root@abc.def.com
C.        nowhere, It is not specified in the SOA record
D.        me@def.com

D (Since the @ has special meaning in dns records, there is a . where the @ should be in regular email naming conventions, therefore the me.def.com actually means me@def.com)

5.        Given the following, How long is the retry timer set for?
@        IN SOA abc.def.com.                me.def.com. (
                1
                43200
                3600
                604800
                86400
                )

A.        12 hours (43200 seconds)
B.        1 hour (3600 seconds)
C.        1 day (86400 seconds)
D.        1 week (604800 seconds)

B (The order of the numbers in the SOA record (although usually commented out) is as follows:  Serial Number, Refresh Timer, Retry Timer, Expire Timer, Minimum Timer)

bnso

1.        What file would the following be found in?
Zone “my.corp.com” {
        type master;
        file “db.my.corp.com”;
        allow-transfer { 192.168.3.8 };
};

A.        /etc/named.conf
B.        /var/named/named.root
C.        /var/named/root
D.        /etc/named.boot

A (This is found in the /etc/named.conf file)

2.        Which of the following will turn on debugging for BIND?

A.        /usr/sbin/in.named –d
B.        pkill –INT in.named
C.        /usr/sbin/in.named –d3
D.        pkill –USR1 in.named

B, D (The debugging tools for BIND are used by sending four PKILL signals (in solaris 7 and above) to the in.named process.  Those signals are –INT –USR1       –USR2 –HUP)

bnso

Item 1

Which layer in the TCP/IP Five-layer model performs end-to-end data transfers?

A     Internet  
B     Transport  
C     Application  
D     Network Interface  

Answer:
Option B is correct because the Transport Layer performs end-to-end data transfers.
Option A is incorrect because the Internet Layer manages IP datagram delivery and routing between networks, based on a destination IP address. Option C is incorrect because the Application layer consists of user-accessed application programs and network services. Option D is incorrect because the Network Interface layer manages the delivery of data across the physical network.

Item 2

What is the function of the gateway LAN component?

A     It forwards packets between separate networks.  
B     It connects two or more networks that use different protocol suites.  
C     It amplifies and regenerates data signals to extend the transmission distance.  
D     It provides for the logical dynamic connection and disconnection between cable segments.  

Answer:
Option B is correct because the gateway LAN component connects two or more networks that use different protocol suites.
Option A is incorrect because the router forwards packets between separate networks that communicate using the same protocol suite. Option C is incorrect because the repeater amplifies and regenerates data signals to extend the transmission distance. Option D is incorrect because the switch provides for the logical dynamic connection and disconnection between cable segments.

bnso

Item 3

What is issued when the MAC address of a target host is unknown?

A     ARP request  
B     PPP request  
C     BIND request  
D     RARP request  

Answer:
Option A is correct because the ARP request is issued when the MAC address of a target host is unknown.
Options B and C are incorrect because PPP and BIND are not valid requests. Option D is incorrect because the RARP request is issued when the IP address is unknown.

Item 4

Which type of address can be used for communicating with all hosts on a local Ethernet?

A     unicast  
B     broadcast  
C     multicast  
D     subnet mask  

Answer:
Option B is correct because the broadcast address can be used for communicating with all hosts on a local Ethernet.
Option A is incorrect because the unicast is used for communicating with one host on a local Ethernet. Option C is incorrect because the multicast is used for communicating with a subset of hosts on an Ethernet. Option D is incorrect because the subnet mask is a parameter used to determine the network component and host specific component of a given IP address.

bnso

Item 5

Which statement about indirect routing is true?

A     Packets can be sent without involving a router.  
B     A kernel routing table is maintained by workstations.  
C     It consists of permanent routes unless manually removed.  
D     Packets are sent to a host not on the same physically attached network as the source

Answer:
Option D is correct because indirect routing occurs when packets are sent to a host not on the same physically attached network as the source.
Option A is incorrect because indirect routing does involve IP datagrams being directed to and forwarded through a router. Option B is incorrect because although table-driven routing correctly describes the means by which routes are stored in kernel memory on Solaris 8, the table itself may contain routes to destinations that require direct and indirect routing. Option C is incorrect because static routes are permanent routes unless manually removed.

Item 6

Which file enables the rlogin program?

A     /etc/init.d/rpc  
B     /etc/resolv.conf  
C     /etc/inet/networks  
D     /etc/inet/inetd.conf  

Answer:
Option D is correct because the /etc/inet/inetd.conf file enables the rlogin program.
Option A is incorrect because the /etc/init.d/rpc file starts rpcbind. Option B is incorrect because the /etc/resolv.conf file is needed by a DNS client (known as a resolver) and primarily contains the IP address of 1 or more DNS servers, and may contain an optional domain name and search list. Option C is incorrect because the /etc/inet/networks file associates a network name to a network number.

bnso

Item 7

In which file can you view the alias name and process name for a service?

A     /etc/rpc  
B     /etc/nsswitch.conf  
C     /etc/init.d/inetsvc  
D     /etc/inet/inetd.conf  

Answer:
Option A is correct because the /etc/rpc file stores the alias and process name for a service.
Option B is incorrect because the /etc/nsswitch.conf file is used for the name service switch. Option C is incorrect because the /etc/init.d/inetsvc file is a startup script to start the inetd service. Option D is incorrect because the /etc/inet/inetd.conf file is used to start server processes.

Item 8

Which file or NIS+ table is modified when defining additional DHCP symbols?

A     the dhcptab database  
B     the /etc/dhcp/inittab file  
C     the /etc/default/dhcp file  
D     the /etc/default/dhcpagent file  

Answer:
Option A is correct because the dhcptab database stores macros and symbols.
Option B is incorrect because /etc/dhcp/inittab contains DHCP options. Option C is incorrect because /etc/default/dhcp contains DHCP variables. Option D is incorrect because /etc/default/dhcpagent contains DHCP tunable parameters.

Item 9

Which DNS resource record type specifies hosts configured to receive mail?  

Answer:
The correct answer is MX. The MX DNS resource record type specifies hosts that are configured to receive mail.

Item 10

Given the command:
/etc/init.d/xntpd start
Which function is performed?

A     The NTP daemon is started.  
B     The stratum-1 server is started.  
C     The file logging processes are started.  
D     The file encryption processes are started.  

Answer:
Option A is correct because the NTP daemon is started by issuing this command:
/etc/init.d/xntpd start
Options B, C, and D are incorrect because the stratum-1 server, the file logging processes, and the file encryption processes are not started using the specified command.
The exam tests on understanding of the concepts, named of the configuration files & its locations. Very less on command & its format. Focus a lot on the features & advantages & disadvantages.